newegg.com offers the Samsung 64GB Ultra UHS-I Class 10 microSDXC Memory Card, model no. MB-MGCGBA/AM, for $58.99. Coupon code "EMCWXVV78" cuts it to $53.99. With free shipping, that's $0.84/GB, the lowest total price we could find by $10, and the least expensive Samsung 64GB microSDCX we've seen. (It comes with a full-size SD card adapter. Rebate ends October 25.