Sony 64GB Class 10 SDXC Card for $33.99 – Deal Alert September 20, 2013 By Eric Reagan Amazon has a solid deal on a Sony 64GB Class 10 SDXC card for $33.99 (reg. $64.99). Check it out here at Amazon.com. Class 10 cards deliver on speed for HD video capture, which goes along with the size advantage of the SDXC spec. For more details on what all the classes and card specs mean, check out my resource article Demystifying SD Cards.