Make it possible to gather items together and add one price for the whole purchase,for when we buy multiple things in one deal.
I do such deals frequently,and some cant really be easily divided per item (a purchase of a system with games and accessories for x price for example),so putting the price for the whole haul makes far more sense :).
as for how to do that, you could have the "cost" column be widened a bit and, next to the amount paid figure, add a clickable "+ X more Items" that leads you to a page with all the items bought for that price.
so if i bought, for example, a system and 4 games and 2 extra controllers from someone for 50$, the price you see on any of them will be 50$ and right next to it would be "+ 6 more items" that you can click to see everything that you bought for this 50$.
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