I think what would make this easier is to just have a whole section
just with item auctions, no Pokemon attached, just items. But I do
love this idea so I support ^^
The only problem I see with this is that there are so many
different items... I would suggest having a box (like Shiny and
Missing Pokemon in Auction) or whatever the GTS would have but that
would be crowded too. If there was a drop-down bar like there is
for the Pokemon, but instead listing all the items, then support!
I like the idea, but I think for items it'd just be overall easier
and neater if, in addition to the search boxes, we had a drop-down
menu to put the pokemon in either a trade for a pokemon with or
without an item, and the comment was mandatory if you chose to put
a pokemon in the item trades. That way if someone wants to trade a
rare pokemon (Like a Mega) for an item, but it doesn't have an item
attached to it, it can still be seen in an items area.
This has been implemented in the new GTS update (so I guess this
suggestion is 50% implemented...? Leaving this open since I don't
know if you still want/need it for the Auction House)