Seagate Expansion 14TB External Hard Drive ($$369.99 - $130 = $239.99)

I’ve been buying used 8TB SAS enterprise drives from eBay with great success at $50USD each. No failures yet.

Tried a few different resellers but they all seem ok. HGST drives.

Guessing they’re cheap because they don’t work with regular SATA controllers so not as high a demand. Paired with an equally cheap SAS controller it’s a great deal for adding lots of cheap storage.