desperately
Man, drop that word =D

I support the Buyback function, but:
Having your gear, your rare things sold instead of other things is entirely your fault and not the UI's.
Now rage.
Rage done.
Let me explain.
Once you select an object to sell you know what you're selling, so you check it again. In the second phase you see the object's prize on the selling, and you ask yourself "Yeah, that's what I want to do. Sell This at That price." (speaking of prices... I'll leave this at the end of this writing). In the instance you press Sell, you're sure that what you've sold is what you've selected. If you have sold something you didn't select, then you've selected wrong. That happens also with the WoW's buy/sell system, and it's a Human issue.
While agreeing that the UI needs more tweakings, until we receive informations about this feature I say: Be conscious on what you'll be selling.

About the price... It's nice that we know the selling price of an item, but that's only at the selling stage. Once you've sold it you have to sell that item again to know its price.
Is it possible to always display the price of an already sold item?

Thanks for the headsup!