eBay Product Number: 321754955036
Seller User Name: gribschaw
Purchase Date: 2015 May 18

Advertised as 512 GB Micro SDHC/SDXC ("SDHC" on packaging and "SDXC" on card). I estimated that only 16 GB are in fact available.
Seller did not respond to any of my eBay messages, and he has not left feedback for the purchase.
Seller had 100% positive feedback at the time of my purchase.
Card seemed to work initially, but folders and files soon started to disappear. Later, mounting the card was impossible.