Amazon offers Prime members the Samsung EVO 32GB Class 10 UHS-1 microSDHC Card with Adapter, model no. MB-MP32DA/AM, for $9.86 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $8.02.) That's the lowest total price we could find by $2, although in October we saw it for pennies less. It features read speeds of up to 48MB/s.