I vote for 'seller should go to the winner server/buyer's server' .As of reasoning?
-If the seller already knowing that 'he should go to other server in case the winner is on different server' means he already ready to take risk , the risk might be
° he need to stay on that server for certain time
°pay cc price for transfer
°give cut price from the agreed deal(like option 2)
and if the seller think cross server trade is troublesome ,then why not use server trade then?
i think the important things in making money,in trade we call selling,is take the initiative,if u need money take the consequences,if don't want take the consequences just do what you can.
Done~