Seagate Mach.2 18TB - $400 / 550MB/s

[Tech Junky]

Supermicro (Seagate) 18TB 3.5" 7200RPM SATA3 Dual-Actuator 6Gb/s 256M Internal Hard Drive (HDD-3T18T-1FECR)

Seagate 18TB 3.5" 7200RPM SATA3 6Gb/s and 256MB Cache Dual-Actuator, 512e/4Kn HDD-T18T-ST18000NM0092 Supermicro Certified

store.supermicro.com

https://www.seagate.com/www-content/datasheets/pdfs/exos-2x18-DS2093-1-2202US-en_US.pdf

I had been watching for these to come down in price and be available for order. I might still pick one up as a backup for my all flash setup I'm putting together.