Ending today, Newegg offers the Patriot 64GB LX Series UHS-I Class 10 Secure Digital Extended-Capacity SDXC Card, model no. PSF64GSDXC10, for $29.99. This $10 mail-in rebate cuts it to $19.99. With 99 cents for shipping, that's the lowest total price we could find by $9, although we saw it for a buck less two weeks ago. It features read speeds up to 50MB/sec.