As one of its daily deals, Amazon offers Prime members the PNY 64GB Elite Performance UHS-1 Class 10 Secure Digital Extended Capacity Card, model no. P-SDX64U395-GE, for $21.99 with free shipping. (Non-members can spend $35 or more to bag free shipping; otherwise, shipping adds $8.) That's the lowest total price we could find by $11. It features read speeds of up to 95MB/s. Deal ends today.