So I listed a Macbook Pro on ebay and it sold. However, the buyer has 0 feedback, and their account was just opened 4 days ago. They did pay instantly (as required to end the auction), so it's not like I'm worried about getting paid. I'm more worried about them pulling some stunt to get ebay/paypal to reverse the charges on some BS claim, and me being out a nice chunk of money AND a laptop. How worried should I be? I plan on using shipping insurance and signature requirement as well.