They're coming from sellers who have a 99%+ rating though. Would those power sellers really want to hurt their rating?
Absolutely, I purchased one from a seller with 20000+ rating with several feedback saying they got their 32gb cards.
Shortly after I paid, I got email from ebay that the seller's account has been cancelled/closed/banned and that I should request a refund.
two weeks later I get a package in the mail with what looked like a 32gb micro SDHC card. put it into the computer, looked to be 32gb, copied 32gb of files on there, it accepted it, tried to open those files, none would open. tried to format it, it would not format.
Finally I ran a tool called h2testw on it. and it found the card was a fake, actually only 2gb SD faked to look like 32gb SD.
This from a seller who had 20000+ rating.
I've been watching other 32gb micro sd auctions on ebay, many of those sellers also have very high ratings, and lots of the listings get removed, and sellers accounts cancelled by ebay.
Google it, there are lots of similar stories. Those $30 to $40 32gb microsd cards are all fake.
They do a very good job making it look real, but you should not trust your data on them.