A bit old, and not with the performance of modern NVMe drives, but they're data center quality and at a good price point (IMHO).
960GB M.2 SSD Samsung PM953 PCIe 3.0 x4 MZ1LV960HCJH MZ-1LV9600 DWPD 1.3 | eBay
Used less than 500 hours, no information on remaining endurance (though at 1.3 DWPD and 500 hours, I'm not super concerned).
The seller also has units available with less than 100 hours on them for $5 more:
960GB 110mm M.2 DWPD 1.3 SSD Samsung PM953 PCIe 3.0 x4 MZ-1LV9600 100 Hour Use | eBay
The seller has a sale of 7% off for Labor Day, bringing the price of the 500 hour units to $69.70 each and $74.35 for the 100 hour units.
Edit: They accept BO for the 100 hour units and according to the item description, you should try BO of $65:
I've bought some motherboards (1155, 1150) from this seller before, they arrived very well packed and worked perfectly.
Note that these are M.2 22110!
960GB M.2 SSD Samsung PM953 PCIe 3.0 x4 MZ1LV960HCJH MZ-1LV9600 DWPD 1.3 | eBay
Used less than 500 hours, no information on remaining endurance (though at 1.3 DWPD and 500 hours, I'm not super concerned).

The seller also has units available with less than 100 hours on them for $5 more:
960GB 110mm M.2 DWPD 1.3 SSD Samsung PM953 PCIe 3.0 x4 MZ-1LV9600 100 Hour Use | eBay
The seller has a sale of 7% off for Labor Day, bringing the price of the 500 hour units to $69.70 each and $74.35 for the 100 hour units.
Edit: They accept BO for the 100 hour units and according to the item description, you should try BO of $65:
Try 65 in offer
I've bought some motherboards (1155, 1150) from this seller before, they arrived very well packed and worked perfectly.
Note that these are M.2 22110!
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