Today only, Buy.com via Rakuten Shopping offers the Crucial M4 512GB 2.5" Serial ATA 6Gb/s Internal SSD, model no. CT512M4SSD2BAA, for $389.99. Coupon code "5106608" cuts it to $329.99. With free shipping (select "Budget" at checkout), that's $0.64/GB, $20 under our December mention, and the best no-rebate price we've seen for a 512GB SSD since Black Friday week. (It's a current price low for this model by $49.) It features read speeds of up to 500MB/s and write speeds of up to 260MB/s.