The same card goes for on Amazon, so this is either an alarmingly fishy or really fantastic deal. You should keep in mind that fake and counterfeit MicroSD cards are quite abundant, and use your better judgement. On the plus side though, the seller isn't located in China, has an impressive 99.4% positive feedback rating, and seems as legit as you could possibly be on eBay. And then again, for $10, you aren't risking a lot.

eBay via Slickdeals