Amazon offers Prime members the PNY 64GB Class 10 microSDXC Secure Digital Extended Capacity Card, model no. P-SDUX64U1-GE-A, for $23.38 with free shipping. (Non-members can spend $35 to qualify for free shipping; otherwise, it adds $8.) That's $7 below last month's mention of a similar 64GB model and the lowest total price we could find by $15. It features transfer speeds of up to 40MB/sec and comes with an adapter.