TigerDirect offers the ADATA 64GB Premier UHS-I Class 10 microSDXC Card, model no. AUSDX64GUICL10-RA1, for $19.99 with free shipping. That's $6 under last month's mention and the lowest total price we've seen for a single card. (For further comparison, we saw two of these cards for $37, or $18.50 each, last week.) It includes an SD card adapter.