Buy.com offers the SanDisk Ultra 64GB Class 10 Secure Digital High-Capacity SDXC Card, model no. SDSDU-064G-A11, for $46.99 with free shipping. That’s $0.73/GB and tied with our mention from last week as the best price we’ve seen for a 64GB Class 10 SDHC card. (It’s a current price low by $10.) It features read speeds up to 30MB/sec.