The best scam temptative was last month. A guy bought a new Tablet PC for $980, shipped to his office with FedEx signature required :)
The Box arrives on Monday and the guy says come back on Thursday - weird. Thursday FedEx delivers and a lady signs the package let's call her Jane doe.
Friday the guy files a complain with eBay and PayPal for item not received... the money is withdrew from my paypal in seconds :
I forward paypal the FedEx tracking info, FedEx is involved and calls me.
A week later, the guy admits that he asked Jane Doe to sign for him and sent me an email saying that he just tried.
Well, PayPal and FedEx didn't like it and filed a report at his county sherif office.
My money was back the next day, eBay remove the neg feedback and cancelled his account.
So if we do things correctly (tracking, signature, no over priced shipping costs...) and are victims of bad guys, FedEx, PayPal and eBay are covering us.