They have two of these available. Cheaper than any other new price I could find:
https://www.cdw.com/product/SAMSUNG-860-EVO-500GB-SATA-2.5-SSD/5189414?pfm=srh
https://www.cdw.com/product/SAMSUNG-860-EVO-500GB-SATA-2.5-SSD/5190024?pfm=srh
https://www.cdw.com/product/SAMSUNG-860-EVO-500GB-SATA-2.5-SSD/5189414?pfm=srh
https://www.cdw.com/product/SAMSUNG-860-EVO-500GB-SATA-2.5-SSD/5190024?pfm=srh