Hi. I want to upgrade to a 32gb SD card, preferably a class 10. I see some good prices on eBay (under $30.00) but I'm not familiar with the brands. Ideally I'd like a brand name like Samsung or SanDisk or even PNY or Kingston. However, for the price I want the brands are Professional or Transcend or Team. Has anyone had experience with off-brand cards? Is the savings worth the risk?