I have a few things on CL right now, and of course I get these two spam emails as soon as the listings went up. The ol "I'll send you a certified check, then I will pick the item up later. I will write the check for XXX over the amount, you just need to send back..." bullshit.
So, I figured I'd troll the shit out of this asshole. So far I've given him 5 different addresses to send the check to because "I can't remember which one is the correct address", and have been offering other non-existent products to him for a "great price", and all sorts of other BS. I'll see how long I can string him along.