Adventurer Guild
Michael noticed a few things by comparing the price tag of the items in the Rainbow Koi shop, and the price he was given for the goods he sold.
First, the Tier-1 Monster carcasses of the Untamed Jungle were being sold for a pretty high price. Michael expected many Adventurers to enter the Untamed Jungle to hunt monsters, but it looked like they couldn't supply enough to cover the demand.
Second, Summoning Scrolls and blueprints were ridiculously expensive. In fact, the blueprints Michael sold were priced much higher than the blueprints that were hard to purchase in the House of Witchery, and other shops under humanity's governance.
The blueprints he sold were duplicates that could be procured everywhere in the Untamed Jungle, yet their price was quite high. The price of Summoning Scrolls was even more ridiculous. Using a rough conversion from Zentik to dollars, Michael guessed that Summoning Scrolls were roughly three to four times more expensive.