MyDigitalDiscount via Newegg offers the Samsung PM961 1TB M.2 PCI Express 3.0 x 4 OEM NVMe Internal SSD for the in-cart price of $349.99 with free shipping. That's tied with our June mention and the lowest price we could find by $50. It features read speeds up to 3000MB/s and write speeds up to 1700MB/s.

Update: Specs corrected.