Newegg offers the Samsung 950 Pro M.2 512GB PCI-Express Internal SSD, model no. MZ-V5P512BW, for $334.99. Checkout via Newegg's mobile site, iPhone app, or Android app, and apply coupon code "MBL160301B" to cut that to $294.99. With free shipping, that's $2 under last month's mention (which required in-store pickup) and the lowest total price we've seen. (It's the best price now by $32.) It features data transfer rates of up to 32GB/s.