Amazon offers the Plextor M8Pe M.2 2280 512GB PCI-Express Internal Solid State Drive for $219.99. Clip the $20 off coupon to cut that to $199.99. With free shipping, that's $5 under our mention from a month ago and the lowest price we could find by $23. It features a PCI Express 3.0 x4 connector with up to 2.3GB/s sequential read and 1.3GB/s sequential write speeds.