Idea..

If it has been said before or is stupid please just ignore it :D

I think there should be a new public room with loads of market stools.. like an old fashioned market place, where you can "rent" a stall for a certain amount of time, maybe 5-10 mins. The sellers items can be shown once you click on the stall - the buyer can double click on what they need, and then offer the seller.

If ive confused you, just smile and ignore this :)

Good idea never heard of it before but there would be alot of people in the same room at the same time so it would be VERYYYYYYY laggy. Also 5-10 mins would be very short 30 - 60 minutes would be a good time limit I think.