Newegg has the QNAP TS-253D-4G-US 2-Bay Professional Desktop NAS Enclosure with Intel Celeron J4125 CPU and Two 2.5GbE Ports (2020 model) for $369 - $20 off with coupon code 2FTSTECH88 in cart = $349 with free shipping.
Ends 9/15 at 9AM PT. Adorama has the QNAP TS-230 2-Bay Diskless Personal Cloud NAS Storage System with Realtek RTD1296 Quad-Core 1.4GHz processor and 2GB DDR4 RAM (2020 model) for $147 with free shipping.
Shell Shocker! Today only. Newegg has the QNAP TS-431K-US 4-Bay Diskless Personal Cloud NAS Storage System with Alpine AL-214 Quad-Core 1.7GHz processor and 1GB DDR3 RAM (2020 model) for $319 - $60 off with coupon code 93XPQ86 [Exp 8/14] = $259 with free shipping.