BuyDig offers the Sony 64GB UHS-I Class 10 SDXC Memory Card, model no. SF64UX/TQN, for $31.99. Apply coupon code "VISASAVE10" and check out with Visa Checkout to cut the price to $21.99. With free shipping, that's $8 under last month's mention and the lowest total price we've seen. (It's a current low by $13.) It features read speeds of up to 94MB/s and write speeds of up to 45MB/s. Deal ends July 23.