Maybe it is not my place to say, but have you tried things like purestorm instead? I am worried that if a trade goes wrong, then the forum isn't to blame, but the looser is out-of-pocket. If an advertisement of a model goes wrong, then the consequences could be a little more unsavoury.
I know we are not meant to 'advertise' other websites/forums, I have no association with that site, but will remove the suggestion if it is considered too far against the rules.
My only concern is that anyone can view these forums. Anyone can register here, and obviously there is no 'background check' on who might try and contact you.
My understanding is that purestorm does a little background checking, and at least tries to ensure that there is a portfolio or similar.
This doesn't remove all of the problems, as a lady I know was contacted via a profile she had on that site, for a 'how would you like to do some modelling for this [show]' (a well-known/well-publicised show which requires a lot of attractive models), by a gentleman who resisted all attempts at confirming his identity, including email address or website, and there was no way of determining whether it was genuine or not.