Meritline offers the Super Talent 32GB UHS-I Class 10 MicroSDHC Card with SD Adapter, model no. MSD32ST10R, for $17.95. Coupon code "MLCK31YNL1" cuts it to $8.99. With free shipping, that's the lowest total price we could find by $13, outside of the mention below.
A close price: Next Warehouse offers it for $9.98 with free shipping.