Amazon has the Crucial P1 500GB 3D NAND NVMe PCIe M.2 SSD for $74.99.
Fast, well-reviewed drive from one of the most reliable names in memory. This is the first time (that I’ve been able to find) that this has been sold for less than full retail ($90). Everybody else still has it at that price. A few weeks ago, the going price was $110. Grab it before they put it back at retail price.