Illegal Trades:
Do not steal other people's trade threads. (you may be warned for this, as it is spamming).
No trades via PM. (It's harder to prove a scam via PM than from a trade thread, so always negotiate and deal through a trade thread, not PM).
Do not trade for / sell CD keys, accounts, character names, battle.net games (this includes IP's), dupe methods, or any other items you may question. (links to auction/advertising sites and all sites alike are also not allowed).
Do not trade for / sell real life items outside the Donor Forum.
Do not trade hacked / duped items on any ladder forums. (trading these items in signatures / profiles is also not allowed).
Do not make unclear trades. (ie: 100 fg for any items) this includes mystery packages and anything else you may question.Do not offer fg/items you don't have.
Do not trade items cross games/realms/cores.
Do not use false advertising to describe an item. For example, if an item is a common dupe and is being sold in mass, it cannot be described as legit/perm/whatever else you may use to imply the same meaning.
Do not trade High Runes in amounts over 40. (Always state how many Hrs/Sojs/Organ Sets/Bugged items you have for trade).
Do not trade SoJ's in amounts over 40.
Do not trade Organ Sets in amounts over 15.
Do not trade bugged items like Bmanas, Bugged belts in amounts over 40.
Do not trade for ears. However, temporarily Ear trading IS allowed on Hardcore.
Do not hold any kind of events like raffles/ironmans/barbruns etc.
Source
http://forums.d2jsp.org/info.php?p=6