gundar: Instead of everybody dreaming, why don't we make a list of awesome features, get a few votes and start a community sourced project? Facebook, HP, Apple, they weren't the first of their kinds and they all started on their owners money in a basement (or so I am told).
Community sourcing or open sourcing an engine has potential for competing with TradeMe.
It could equally be developed as a closed source business.
Either way this leaves individual players to concentrate on the business side of things with their own unique market models and front ends to support that.
That is something I would be interested in contributing to. It would be a lot of fun doing that.