This is one of the cheapest 800GB drives I've seen and it's an AIC with a best offer option on it
Intel SSDPEDMD800G4 DC P3700 800GB AIC NVMe Enterprise SSD | ONLY 249 HOURS | eBay
Intel SSDPEDMD800G4 DC P3700 800GB AIC NVMe Enterprise SSD | ONLY 249 HOURS | eBay