Ebay has screwed me over a couple of times (not in regards to phones)... primarily where I sell something, can provide tracking info, yet the person I sold it to claimed to never have received it. Despite providing the correct tracking number and all information I could, paypal sided with the other person so I was out of both my stuff and my money.

It's happened a couple of times. I don't sell stuff on ebay any more. I'm tired of getting ripped off by people who just file to get their money back even after they have what they bought. It's like a total coin flip whether you'll win a paypal dispute or not, no matter how much info you can provide. I bet you could send them a notarized signature saying that the buyer got the item and still lose a dispute.