here is my experience of trading will help you guys not be scammed.
when you trade, u must do the steps as following:
1. when he/she or you join trading game, type /time firstly
2. then ask the trader JSP name and make sure the same person.
3. and mention the trading items and price again.
4. before you trade, make ss of ur inventory and body.
5. when u put the items in trading window, make ss
6. after trade, make ss of ur inventory and body.
7. sending fg or waiting for ur fg.
8. Dont leave this game before u sent and recieved the fg
9. here is important. if u are scammed, the following things you need to do
9.1 make ss of talk with time stamp
9.2 make ss of he/she pmed you in your pm box (i suggest you dont delete the pm till the trade is successful)
9.3 copy the trade Link (i suggest you dont close the trade link till the trade is successful)
9.4 copy the trader profile link in d2jsp
9.5 make a topic in here:
http://forums.d2jsp.org/index.php?showforum=2509.6 waiting the Mod decision. that is it
one of useful links is how to upload the ss instruction:
http://forums.d2jsp.org/index.php?showtopic=13700629&f=250