Ending today, Amazon offers Prime members the SanDisk 64GB Ultra UHS-I Class 10 SDXC Memory Card, model no. SDSDU-064G-A46, for $29.99 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $8.02.) That's $10 under our February mention and the lowest total price we've seen for this card. (It's also a current price low by $7.) It features read speeds of up to 30MB/s.