What's Your Worst Craigslist Horror Story?

All you wanted to do was sell a desk. A really nice desk you like. So you put it on Craigslist, listed it at the price you thought was fair, and specified "Or best offer." Then come the crazies.

Yup, Craigslist is full of jerks. Anybody who has ever tried to sell anything, or, worse, find an apartment on Craigslist, knows this. But amongst scammers, flakes, and low-ballers, there is a very special variety of Craigslist prowler: The troll that makes you want to throw your computer (or yourself) out the window. So we ask you now, who is the most horrible person you've ever met on Craigslist? Here's a recent example we lived through to get you started:

What's Your Worst Craigslist Horror Story?

Note: Let's be better than the jerks and leave identifying details out of this, yeah?