I have sold quite a few iphones and ipads and few airs on ebay, and have a few try to scam me but steps I took saved me against ebay and paypal and thought Id share if any was thinking about it/ This only works in US mostly. The scam usually is they received an empty box or not item advertised, or try to send you back an empty box . The way to protect yourself is have either ups or fedex pack the item. Also record the serial or imei number on the receipt. it does cost extra about 10 to 15 but its worth every penny. Also make sure in your post they understand if they ship back, it must be ups or fedex, youll even pay the difference. That way you can re direct the delivery to the ups store or fedex store. Have them open the package at the store. If the buyer sees you taking all these steps, usually the scammer will cancel the auction and they will move on to easier prey. I have won a paypal case by doing these steps. Make sure you email the buyer all the steps you are taking. Now some here might say all these steps are not needed, but after being the victim of the return an iphone 3s that looked like a few rocks, you learn. My area sucks for craigslist because so many lowballers and people bury your ads. I won a paypal 4s victory because the guy sent a box without the phone but I had it opened at ups store and paypal sided with me and kept my funds. Good luck with your sales.