An old shard I played on ages ago had "player Purchasing Stones"

Basicly you click the stone and u have a Add Item button - Target Item
then it lets you set a price YOU are willing to pay for said item

you can also add/remove gold from stone

With this a person can have a "vendor" of sorts the BUYS items from players!!
It was awesome, loved it!

IE. I add a ED to my list @ 100k gold and drop in a million gold.. a few later I check stone and collect any ed that players sold to the stone!