I was reading the boat/dock thread (whcih is a cool idea). and thought about land based markets. Would a construction of either a whole market say 8x8 or 10x10 maybe? or individual stalls? 1x2? to make a market area for players to set up wares to trade (on LiF:YO) we seem to have a lot of requests to trade things but no real central point for comerce. The stalls would act as a trading window where both parties could place what they are trading in their trade box and the buyer would do the same in his box.
Both players would then push "shake hands" which then locks the trade window to stop people pulling items out on last minute and then the "confirm" button which only highlights up when both are shaking hands.
would save waiting for 2 minutes after dropping a bag and then possibly some cheeky git run in and ruin the deal.
Policing of the area would be up to the community involved. but I would guess most merchants would have guards anyhow.