eBay

QNAP TL-D800C 8-Bay USB 3.2 Gen 2 Type-C JBOD Enclosure
Storage Expansion for your QNAP NAS, computers (supports Windows and Mac), and Linux servers.
In like new condition.
Very lightly used, about 1 month in total, but I ended up migrating to a TrueNAS server that does not support ZFS pools over JBOD.
Comes with all original accessories (power cord, USB C to USB A cable, keys, manual) and original packaging.
Also have a brand new QNAP TL-D800C for sale, check my other listings.

USB 3.2 Gen 2 Type-C High-Capacity JBOD Storage Enclosure
Supports up to 8 x 3.5-inch SATA 6Gb/s, 3Gb/s
250W Power Supply Unit
1 x USB 3.2 Gen 2 Type-C Port (10 Gbps)
Includes 1 x USB Type-C to Type-A Cable
The TL-D800C can only be used as a separate storage pool or volume on your QNAP NAS. It cannot be combined with an existing storage pool/volume.