Amazon offers Prime members the Kingston 32GB Class 10 UHS-I microSDHC Memory Card with Adapter (pictured), model no. SDC10/32GBET, for $13.49. (Newegg charges a few cents more.) Plus, Prime members receive free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $8.) That's the lowest total price we could find by a buck.
Also available is the Kingston 64GB Class 10 UHS-I microSDXC Memory Card with Adapter, model no. SDCX10/64GBET, for $26.49 with free shipping for Prime members. (Newegg charges a few cents more.) That's another price low, this time by $2, although we saw it for $6 less last summer.