Not to be overly contentious here, as I do understand that the OP did not follow rules, but I do think that eBay and PayPal have a problem. Of course, this type of scam is hard to prove, but if a "registered user" is repeatedly buying large-ticket items, then claiming their account was hijacked and they're not responsible, but multiple sellers are saying a guy picked the item up (because they were nice/gullible enough to let him), well, I would hope PayPal's response would be more than "you sellers didn't follow the rules, too bad".
It's like if you pay to park somewhere, every lot has a sign that they're not responsible for anything. However, if your car is broken into or stolen, and you find out that other people have had the same thing happen, but management's only response is "read the sign", well, are you likely to ever park there again?
Of course I know that ethics are to business as artichokes are to space travel, but I'll tell you that these threads have dissuaded me from selling large-ticket items or, specifically, buying a prosumer camcorder over eBay. I'd rather pay a reliable online retailer than someone who could close his eBay account tomorrow. Probably eBay and PayPal don't think losing my business is a problem. Whatever.
And claiming that other marketplaces likely have more fraud isn't necessarily comforting to me, and probably not to those who have been scammed, either.