Adata via Rakuten offers its Adata Ultimate 256GB 3D NAND 2.5" Serial ATA 6Gb/s Internal SSD for $57.99 $54.99. Coupon code "ELDORADO" cuts that to $47.99 $44.99. With free shipping, that's $7 under last month's mention and the best deal we've seen, even beating previous post-rebate prices. (It's the lowest price now by $10.) It features read speeds up to 560MB/s and write speeds up to 520Mb/s. Deal ends September 15.

Note: This coupon can be used once per account.