Exactly, theres various stories around different forums of buyers shipping back empty boxes or different coins and Ebay refunding them just because of the tracking showing delivered. About the only sellers that actually get protection (assuming the buyer isn't dumb enough to state his plan in an ebay email) are the ones making Ebay millions a year aka APMEX/Silvertowne/David Lawerence ect. The rest of us when your luck runs out and that bad buyer hits you just have to hope it was a cheap sale.
I've seen times when the sharpie ink leaked through to the coin and permanently stained it. Not sure if this is the case with mylar, but something to test on a junk coin first.
It would probably cost too much but Bowers auction used to have a logo in the seal. That was back when PVC flips/holders were still being used.
Man, you guys are killing me. Although I DO appreciate the honesty and insights. I just want to sell a few low/medium $$ coins & not have to be so paranoid. But I guess that is the world we live in. I never even considered sending back an empty box and then it comes down to he/she said. That really sux. If people would work as hard at making an honest living as they do ripping people off, it would be a much better place for all of us. I truly wish I could expect that others would have the same attitude I (most of us) do about ripping people off. But I guess I can't. And there we have it. Now what to do.....?
It's actually harder to be a criminal because of the additional complexities of trying not to get caught. Then again, humans aren't much into following the logical path.
The easiest, simplest way to do it is to put a staple in the flip. If they open the flip, they bought it for good!
I've seen things stain coins through the mylar on windowed cardboard flips before, but I've never seen it on a two pocket folding flip. TPGs write on these with sharpies all the time.
But this would beg the same question: if the buyer claims otherwise and files a claim, who is ebay going to side with? Everyone always has these ideas that may he fine for the real world, but it must be remembered that when on ebay, you no longer make the rules. One can say whatever they want in their listing, but the fact is that if Ebay says you're taking it back, you're taking it back. Now please understand that I'm not defending this practice; in fact I find the lack of personal accountability allowed by ebay to be reprehensible, but it's their playground, and if you want to play, it is going to be by their rules. Unfortunately, I've yet to see any simple fixes that actually allow a seller to have absolute protection from a buyer looking to scam them.