Newegg offers the Adata 64GB Premier UHS-I Class 10 microSDXC Card, model no. AUSDX64GUICL10-RA1, for $18.99. Coupon code "EMCEHET59" cuts the price to $12.91. With free shipping, that's $2 under our February mention and the lowest total price we've seen. (It's a current low by $6.) It includes an SD card adapter.