Walmart offers the HP S700 120GB Serial ATA 6Gb/s 2.5" 3D NAND Internal SSD for $37 with free shipping. (Newegg charges the same.) That's a buck under our mention from three days ago and the best deal we've seen. (It's also a low now by $9.) It features read speeds up to 550MB/s and write speeds up to 480MB/s. Deal ends April 16.