The money here seems slightly irrelevant as $10K to one person could be equal to $200 to the next. I do think prices have become way out of hand but it's down to the buyer to decide if it's something they can afford. It's not the kind of money that I have to drop on something but then spending $100 on a figure would probably seem like complete madness to someone who collects nothing.
Reading between the lines it seems that there really was no reason to doubt anything going wrong with this deal after all the history between both buyer and seller so it's really sad that it's turned out this way. The seller has screwed their reputation and should realise the $10k is still a lot of money to just brush off not chasing up on, no matter what kind of deals they're used to making. We all know to protect ourselves when sending money to people (for the most part anyway), but there are people who I've felt with before that I would have no reason to doubt anything going wrong, this just shows how things can go wrong no matter who you deal with or what relationship you have with them.
I guess we have to cover ourselves the best we can but if you are sending such a huge amount (or a small amount that's all the money you have), you have to put something in place to cover yourself for anything happening.
It's a sad story but the circumstances don't sound like someone just handed over $10K to someone they didn't know, that really would be insane.
Ian