It needs an easy but obscure way your friends could "hack" your trove account and find out how much all your stuff was worth. Or maybe make it like a sign-off of some sort... "verify your friend's trove". Maybe then it doesn't show what your stuff is valued at, but your friends can 'hack' it by viewing source.

Then it'd be nice for vouyerism and conspicuous consumption, maybe it'd go 'viral' when view source made it to twitter. Otherwise you better pay people for filling out an advertising survey.