Sandisk Skyhawk NVMe PCIe SSD 3.84TB - 2.5in U.2 - $339

Sandisk Skyhawk NVMe PCIe SSD 3.84TB - 2.5in U.2

$339.00 + shipping

Rated at 4.2 PBw over the lifetime of the drive.
If you need a cheap(er) U.2 adapter - https://amzn.to/2HAVILB

Not sure I am reading this right but this drive seems a lot slower than most SSDs.

Where are you seeing this information @ZaDoctor?

I just miss read it looks like 1500mbps read. Would this work as an unraid cache drive?

Yes, it would!