Update: Amazon is now sold out, but Best Buy is still showing availability.
Amazon has the Samsung 32GB Pro Extreme Speed UHS-1 Class 10 memory card for $19.99 with free shipping for Prime members. All other purchasers will need to spend at least $25 to knock the shipping charges off. Today’s deal is 50% lower than retail, $6 below the next best price currently available and the a match for the lowest price ever. Features up to 80MB/s read and 40MB/s write speeds. May take an extra 1-2 days to ship due to high demand. Also available at Best Buy.