Amazon offers its Prime members the Transcend 64GB microSDXC Class 10 UHS-1 Memory Card with Adapter, model no. TS64GUSDU1PE, for $13.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, it costs $8.05.) That's the lowest total price we could find by $2. It features transfer rates of up to 60MB/s and includes full-size SD adapter.