Adorama offers the Sony 64GB UHS-I Class 10 SDHC Secure Digital High-Capacity Memory Card, model no. SF64UY/TQMN, for $36.95 with free shipping ($0.58/GB). That's the lowest total price we could find by $3, although we saw it for $7 less two weeks ago. It's UHS-I enabled and features read speeds of up to 40MB/s and write speeds up to 10MB/s.