Oh okay, well they do have alot of "plugins" or "add-ons" though.. And a trading system...
http://extralicense.com/trade/
I know it might not be "iTrader" though, but it is a nice system none the less.. and they have an import system to import important / necessary things like posts, threads, users, and etc.. for vB3, vB4 and other systems. But if it's too much trouble, then okay..