Seems like a decent deal on the face of it. Seller accepted $500 apiece when I purchased 4x.
1.5TB INTEL Optane SSD Series DC D4800X 2.5in SSDPD21K015TAR SSDPD21K015TA | eBay
1.5TB INTEL Optane SSD Series DC D4800X 2.5in SSDPD21K015TAR SSDPD21K015TA | eBay