I placed a nice piece of electronic cell phone gadgetry up for sale on eBay. It sold for a bit over $500. The person who bought it has a relatively new account (Jun of 2007), with no prior feedback. They already paid via PayPal, and I initiated transferring the money out of the separate bank account I keep for PayPal stuff.I am, of course, concerned that this person might be a scammer, so I did a little google stalking to find out about them. My results were mixed: they have been at the address listed for at least two years, but an old friendster profile has lots of comments congratulating them on being a computer hacker. So I don't know if they are trustworthy. My concern, looking around at horror stories, is that a chargeback will occur after I ship the device, either at they buyer's request, or because the buyer might have used a stolen credit card.The good news is that I am eligible for PayPal's Seller protection policy , as long as I ship with a tracking number and a signature requirement, which I will do. This should protect me against chargebacks. But I don't know what can go wrong with this. Reading around, it looks like some scammers might be able to reverse charges much later, after the online tracking and signature information have expired.Does anyone have any experience with this? What can go wrong? Other than reimbursing the buyer and relisting the item, what can I do to protect myself?