If you’re UK based, that famous auction site has had a glut of Dell T3610s for a while with 32Gb and a basic nvidia quadra for £140 delivered which i thought was alright.
I took 4 of them and i can’t complain about the boxes - support both legacy bios and uefi (so netboot + gpt disks = easy rebuilding between os’s), they’re quiet (except when working hard obv).
But… the power consumption! Each box is another £12/mo on the electricity bill. So i end up just having them on a smart plug and turned on only when i’m actually using them.