Sometimes bater seems a bit broken to me. For example:

I try to barter a level 25 item which identify estimates is worth 9500 copper and its not worth a level 10 item which is being sold for 2200.
Even a really good level 40 item estimated worth of 10500 copper STILL isn't worth the trade it seems. I know merchants want to trade for something more valuable but this goes beyond highway robbery.

Could barter be evened out just a bit more, or maybe take item level into consideration? If not, allow people to trade more then one thing for an item, for example:

barter 'shoes' 'leggings' 'shirt' for return