Ultimately, the problem is the price caps. If everyone were free to set the price as they see fit, and all of the buyers could see all of the sales of that item, the prices would stabilize at a market-driven price that would reflect the rarity of the item, the effort it takes to get the item, and the quantity of that item that is needed. Using one example, storage depot expansion items are pretty rare, being that they cannot be made but only awarded from the game, and in my game at least, the storage bars are the most rare of the three items needed for expansion. Currently they are price capped at 650 each -- I suspect that if there was no cap, the two common items would end up being around 2 or 3k and the storage bars would end up being about twice that much. At those prices, they wouldn't sell instantly, and someone willing to pay that much would likely actually be able to find them. Of course, I may have underestimated the pricing, and they could end up at 30K or 60K each -- who knows -- but they would eventually find some price to stabilize at.
