QNAP TS-431K 4 Bay Turbo NAS Alpine AL-214 Quad Core 1.7GHz CPU 1GB RAM $258.75 (was $575)
QNAP TS-462-2G 4-Bay Diskless NAS Celeron N4505 2-Core 2.9GHz 2GB $373.05 (Was $829) OOS
Mwave have a couple of QNAP NAS heavily discounted. I could add 10 of each to my cart so there should be enough stock.
I'm not familiar with QNAP so I'll do my best to find some reviews.
QNAP TS-462 NAS Drive Review
Home Lab NAS (QNAP TS-431K)
Edit: QNAP TS-462-2G is back to regular price. Swapped NAS around.
How does this fare against something like a Synology?