Newegg offers the PNY 480GB M.2 NVMe Solid State Drive for $179.99 with free shipping. (Amazon has it for the same.) That's $20 under our mention from two weeks ago and the lowest price we could find by $132. It features read speeds of up to 2.5GB/s.
Update: It's now out of stock at Newegg; however, Amazon still offers it for $179.99 with free shipping.