Please heed our warnings
Guys, we hate when this happens, and we do all we can to keep the site clean of scammers. However, we encourage our users to approach transactions with a heavy dose of caution: If the deal is too good to be true and the seller won't meet you, we think you should pass on the deal. And NEVER EVER use a third-party payment company; once payments are sent via wire services, they can be pulled out anywhere in the world - and there's no way to trace the payment. In other words, the money is gone and you won't get it back, and law enforcement cannot find the guys.
The bolded, red warning above the classifieds is there for a reason: While 99.9 percent of our users are just hard-working Joes like you and me, there are those who are trying to cheat us out of our money.
So please heed the warnings and deal only with those users who you trust (and, preferably, meet).