Amazon offers the SanDisk 64GB Extreme U3/UHS-I Class 10 SDXC Secure Digital High-Capacity Memory Card, model no. SF64UY/TQMN, for $41.92 with free shipping. That's $6 under last month's mention and the lowest total price we could find by $17. It features read speeds of up to 60MB/s and write speeds of up to 40MB/s.