As one of its daily deals, Best Buy again offers the SanDisk Mobile Ultra 64GB Class 6 Secure Digital Extended-Capacity microSDXC Card, model no. SDSDQY-064G-A11A, for $49.99 with free shipping. That's $0.78/GB and tied with its deal from two months ago for the least expensive 64GB microSDXC card we've seen. (It's also the lowest total price we could find for this model by $20.) Sales tax is added where applicable. It features transfer speeds up to 30MB/s. Deal ends today.