Hey, I'm new but made some observations of the auctioning system and have some ideas to improve.
The main problems I see are that some of the items are at a massively inflated price. Next, undercutting seems to be a big issue - if I post up say four items at 200 each, someone will come along and post the same items at 199 meaning I'd have to remove my listings and repost them if I wanted to sell them.
Surely it would be a good idea to actually auction items - you put it a starting price and time limit (1 hour/2 hours/5 hours). You could also have a buy it now price so if you were desperate for an item you could potentially pay a premium price.
Another problem is the quantities - say if I need 50 cherries and look on the auctions then often there is only like 5 cherries to buy or 500. I notice that the site tells you the price per unit. Would it be an idea to be able to buy a certain quantity? So if I had 500 to sell, I could put them up at say 3 per unit and people could buy how ever many they wanted?