Amazon has an HP 32GB Class 10 SDHC for only $22.49 today. This appears to be manufactured by PNY.
While this is a solid deal for the size and speed, if you want something more mainstream, B&H has a Lexar 32GB Platinum II Class 10 card for $25.95, as well as a 32GB SanDisk Ultra Class 10 UHS-I card for $25.95. Or, you can get a 2-pack of the Lexar cards for $41.16, which is the best deal around right now. There’s free shipping on all of these cards at B&H right now.
The Class 10 rating is a rating intended for evaluating video capture performance. In this case, Class 10 is the fastest rating currently available for video performance, which means these will work with just about every HD video camera on the market today. For a more detailed explanation of SD card classes and speed ratings, check out my prior article on Demystifying SD Cards.