"Enough, enough!" Old Eukin sprang up from the chaise longue like a rubber ball and swiftly pounced on the gold coins.

  Whoa! Old Eugene scooped up a handful, then let go, watching as the gold coins slipped through his fingers and fell to the ground with an enticing clink, unable to help but burst out laughing.

  "Get the magic stone!" Tong Dun walked towards the counter.

  This time, old Eugene didn't dawdle at all, and quickly, like a rabbit shot with an arrow, ran to the warehouse and pulled out a suitcase.

  Lift the lid, and inside are small squares like a chessboard, with fist-sized magic stones neatly arranged.

  "They're all high-quality magic stones, one hundred gold Delran per gram." Old Eugene quoted a price, preparing to fleece this country bumpkin thoroughly.

  Magic stones are classified into lower grade, middle grade, upper grade, excellent grade and top grade according to the magic energy contained in each gram. Different grades correspond to different prices.

  High-grade magic stones are now more valuable than gold of the same weight.

  "Top-grade? You can't just say that, let's test it with a stone tester!" Tang Don picked up a piece of magical stone and observed it. The cut surface was very smooth and well-processed, but that didn't necessarily mean its content was high.

  "Haha, I don't have any litmus test here." Old Eugene's face was smiling, but in his heart he was startled, thinking "Oh no, I've run into an expert".

  Azurite is a blue pigment extracted from lichens that live in dark and humid environments, it is a blue powder, commonly used as a magic concentration indicator.

  At room temperature, it dissolves in water and comes into contact with magic stone. It is stimulated by magic energy to change its conjugated structure, producing a color-changing reaction from light color to deep red. The higher the concentration of magic energy, the deeper the color.

  The color card of Shi Ying lists ten color ranges. By comparison, the quality of the magic stone can be accurately distinguished.

  Tang Dun has a sister who studies at St. George's Magic Academy, and he has bought magic stones for her before, so he has experience, besides, even if he doesn't understand, there is still the magic book, absolutely no loss.

  "You can go buy it, Old Glang's general store definitely has some." Danton was too lazy to expose Old Eugin, the litmus test was a basic potion in alchemy, and any pharmacy could find a box of it.

  "Ah, I remember now, there's one more." Seeing that Monty couldn't be satisfied, Old Eugene reluctantly took out a deep brown bottle the length of a thumb and as thick as a coin from under the counter.

  "If you can't, I will!" Tang Dun stared straight into Old Eukin's eyes and placed the magic stone in front of him.

  Old Eugene had no choice but to pinch the rubber dropper, suck up some carbolic acid solution and drop it onto the magic stone.

  The originally purple liquid immediately faded and became lighter.

  "Look, such a deep color, it's absolutely top-grade, no doubt about it. I'll give you one hundred gold coins per gram, it's a steal." Old Eukin wouldn't shut up and refused to use the color comparison card to compare the colors.

  "Your Alchemist qualification is fake, right? I don't even need to look at the color card to know that it's just a mid-grade magic stone. Old Eugene, how many people have you scammed?"

  Listening to Tang Dun's tone with a hint of sarcasm, Old Eugin's face couldn't hold up, feeling somewhat embarrassed. As a half-baked alchemist, he still had some insight and experience, and he knew that this kid was right.

  "A country bumpkin, who actually knows about the Stone Testing Agent. Without even looking at the color card, he can distinguish the grade of the magic stone. Is there still any justice in this world?" Old Eugin slandered, agreeing with Tang Dun's answer, "70 gold coins, not a single one less."

  "You dare to ask for twice the market price of ten gold coins? Keep them and let them rot!" Tandon turned around and walked away, he had enough of this guy.

  "Wait, okay, fifty gold coins, can't be any less."

  Old Eugene hurriedly ran a few steps to pull Tongdon. Although Morning Dew Town was the largest town on the border, without the peak season every year, the merchant teams did not come, and his pharmacy had almost no business. After all, the small town was full of ordinary people who worked hard for a living, and there were very few magic users.

  "Seven!" Tanton continued to haggle.

  "This is going to be the death of me, this price, after deducting transportation costs and storage fees, there's no profit at all." Old Eukin spat out a mouthful of saliva, recounting the difficulties of life.

  "A fixed price, 70% off, seven gold coins per gram. For this quality of magic stone, I want as much as you have." Tang Don waved the gemstone in his hand.

  "Seven tenths is too little, what? All of it? Wait a minute!" Old Eukin immediately began counting on his fingers, calculating how much he could make from this deal.

  Dangton knew the character of Old Eugène, this guy was greedy but had no corresponding business talent, seeing a little benefit, he wanted to grab it in his hand, compared to Old Grandet, he was much worse.

  "A 30% discount is really too little, can you add a bit more?" Old Eugin begged, unaware that this attitude had already exposed his intention to agree to the transaction.

  "I've changed my mind, 60% off, you love to sell or not, I'll go find Old Gelongtai, except for no medicine, his goods are more complete." Tang Dun lowered the price again, he suddenly remembered that there was so much dust on the box, it means it hasn't been moved for a long time, obviously it can't be sold.

  Lao Youjin hesitated, selling at 60% off, already lower than the original purchase price, but keeping it would only weigh down the box, let's take a look at the market price of medium-grade magic stones, each gram costs 10 gold coins.

  This means that a catty of magic stone is worth 5,000 gold coins. Ordinary magicians can't afford to consume it. They usually use low-grade magic stones, and even then, they only extract magic energy when they have no choice but to do so in battle.

  The main customers of the pharmacy are the mercenaries who escort the merchant caravans. Those with power will stock up on magic stones and absolutely won't let unscrupulous merchants make an extra buck, while those without power have to carefully calculate their expenses even when buying low-quality magic stones.

  In combat, using magic stones has its drawbacks and is far less efficient than directly drinking magic potions. Therefore, magic stones are mostly used in industries such as smelting, alchemy, and potion-making.

  Mages generally only dare to draw on mana stones during critical moments of impact, and usually don't dare to use them in normal cultivation.

  Seeing Downton hurry out of the store, Old Eugen compromised, after all, such a wealthy customer, it's hard to come across one in several years.

  "Don't go, I've sold it!"

  Once he made up his mind, Old Eugene's movements quickened, and in ten minutes he had counted out the gold coins, appraised the jewels, and completed the transaction.

  It was a small profit for Tang Dun, but looking at the 20 kilograms of medium-grade magic stones worth 600,000 gold coins, he couldn't get excited.

  Those who want to rapidly increase their strength need to absorb a large amount of magic, and relying solely on the free magic in space is far from enough, so they have to use magic stones and potions to make up for it, all of which mean money.

  "No wonder the Robinson trio was so excited when they first discovered that the underground city had five times the magical energy density. No wonder that as long as they found a region with high magical energy density and reported it to the country, they would at least be awarded the title of hereditary earl."

  Danton sighed repeatedly, only after becoming a mage could he intuitively understand the importance of magic energy, which was the most strategically valuable resource on any plane.

  Wanting to become a strong person without resources is possible, but it's too much of a waste of time. In one's lifetime, how many decades can be spent in vain?

  "Irene, brother owes you an apology!" Tang Dun sighed, thinking of his talented sister. If he could provide her with enough resources, she might have already advanced to the rank of Warlord.

  Tang Dun clenched his fist, he must quickly increase his strength and kill the three Robinsons. The more days he delayed, the more magic they would absorb.

  "Where did your money come from?" Old Eukin blinked his two big eye sockets, full of curiosity.

  "It was bought for someone else." Downton said casually, he used to think that his purse was full enough, considered a rich man, but now it seems that he is still a poor devil.

  "I told you, how could you possibly have so much money?" Old Eugee scratched his belly, rolled his eyes and smiled, "Want to buy some Stone Skin Potion for protection? Carrying so many magic stones outside, be careful not to get robbed."

  "Take one and see!"

  This time Old Eukin was no longer afraid of Tongdon breaking the medicine, and he picked out a dozen or so medicines and put them on the counter.

  "Strength potion, agility potion, can double your strength and agility within ten minutes, only fifty gold coins!"

  "I don't want these, do you have any potions that replenish magical energy?" Tang Don picked up a vial of potion with the label "Swift Shadow" on it, which was a speed-enhancing potion for a short period of time, suitable for escaping.

  "This instant magical potion, just one bottle can fill up a second-tier soul's entire magical energy." Old Eugene patted his chest, with a proud face to promote, "This is the royal magician's handmade potion."

  This is a two-inch long test tube with a rubber stopper sealing the mouth of the bottle.

  Inside was a pale pink liquid, and Tanton saw quite a few granular substances.

  "You can see the quality is good or bad, that's what it means to see a ghost. This time I won't cheat you, even when I sleep I feel uneasy." Old Eukin spoke with flying spittle, exaggerating the benefits of the medicine, talking nonsense.

  Tang Dun didn't understand, but he knew that with Old Eugene's character, he would definitely not get anything good and would probably cheat himself.

  "Considering you've bought a large amount of magic stones, I'll let this bottle of haste potion go for 100 gold coins." Old Eukin made a 'you're making a profit' face and pushed hard to make the sale.

  "What do you think?" Danton stepped back a few steps, took out the magic book, opened it and wrote to ask.

  Magic Dictionary Soul Detection, a green light swept across the medicine on the counter.

  "You're actually a magician?" Old Eukin was startled.

  "A vial of discarded potion that should be destroyed. Drinking it will replenish some magical energy, but the side effects are even greater!" Holma displays the detection result on the book page.

  "What about other medications?"

  "Are these all discarded medicines? Is this a waste disposal site? According to the Pharmaceutical Law, no pharmacy is allowed to buy or sell discarded or expired medicines." Holma soon came to her senses. In such a small border town, when would the Magician's Association have time to manage it?

  "No more, can't afford it." Tong Dun put down the medicine and picked up his suitcase, turning around to leave.

  "Hey, don't go! I'll give you a discount, seventy... no, fifty gold coins." Old Eucalyptus yelled at the top of his lungs as he chased after Tong Dun, "Twenty will do, right?"

  "Keep it for yourself!" Downton shook off Old Eukin's hand.

  ..........

  PS: Outputs follow up, recommended votes shot!