I'd argue that blaming the buyer is not appropriate though - the problem is the lack of regulation (preventing theft in this case) so you can blame the thieves

I'd argue that blaming the buyer is not appropriate though - the problem is the lack of regulation (preventing theft in this case) so you can blame the thieves and/or the police/government, but you can't expect the buyer (or anyone) to determine exactly what price is too good to be true. If you could, then we wouldn't need to have a market pricing system in the first place. I'm reminded of how people would express outrage over products made in a low wage country being defective or toxic, and sometimes a response would be "well, people who demand ultra-cheap products deserve what they get". That's a denial of the fraudulent aspect of such a transaction, and the inability of the consumer to solve it.