I bought this Dell Optiplex 7040 from my University’s surplus store and replaced the RAM and storage (originally 16GB RAM and 256GB SSD).
https://dl.dell.com/topicspdf/optiplex-7040-desktop_owners-manual_en-us.pdf
Dell Optiplex - $60
- 64GB Ram https://a.co/d/iPBaAJC - $44.99 * 2 = $89.98
- 2TB NVMe SSD https://a.co/d/7EjigTP - $109.99
- 8-port unmanaged Ethernet switch https://a.co/d/6lgx1pb - $17.99
Total: $277.96