At $62.80 this is the best price I've seen for a SanDisk 256GB microSD card.
Save around $80 off the list price for a super handy, super large microSD card. I use 128GB versions in my GoPro and will likely swap this 256GB into my Kindle HD 10.
SanDisk Ultra 256GB microSDXC UHS-I Card with Adapter – SDSQUAR-256G-GN6MA via Amazon