I sometimes check Goodwill if I’m killing time. I often leave empty handed, but I spotted a decent looking 21" monitor (older Asus led 75hz) with this tumor bolted to the vesa. $30 for everything. i3-6100, 1x 8gb ddr4 MSI h110 itx, 250GB SATA SSD (wiped), missing the external 19v power supply, but I have one that works. I guess I’ll do something with it, not sure yet.

An i7-6700 is $45 and additional 8GB of ddr4 is $10. It has an Nvme slot, full size pcie, and 2x2.5” bays.