[FreezerburnV]

If you're talking about fixed prices in EVE's economy, you possibly don't understand it very well. There are very few fixed prices in EVE, most of which are things like skill books which by necessity have to be generated by the game systems. Or commodities, which have no real use outside of buying and selling for some small profit.

All useful items in the game are sold to other players, and the price changes over time based on supply and demand, or other traders just being cutthroat about selling their items. I made a decent chunk of money by putting up buy orders for items to get from actual players, and then selling those items to actual players for several hundred percent markup. (that was just how the price was at the time) Occasionally a single item could become entirely worthless to sell because other traders would get into price wars to make sure their items sold first by modifying their sell price down by a small amount. Or buy price up by a small amount.

Recently there was a large war, and the price of a lot of the popular ships went up because the large alliances were buying large amounts of them. Possibly the price of manufactured items went up by some amount as well due to minerals becoming more scarce from alliances consuming huge amounts of them to fuel their war.

All that is to say: you don't sell apples for $5 every time ;) Though the price of certain base goods, such as a common mineral, might only vary by +- 0.10 of an ISK in general.