Had the idea to stop into Goodwill today. Haven't really found anything there since my last find which is the ram in my current PC, new in box Corsair Vengeance 32Gb DDR4 3200 which was a steal at $5.99.
I came across this old iBuypower for $20. The GPU is a GTX 1060 6GB. Really I bought it gambling that the GPU worked so I can put it into a secondary PC of mine that doesn't have one. The GPU works !
I haven't tested the rest of the system but it appears to be a MSI Z170-A motherboard, a Core i5 and 32 Gb of Adata DDR4 3000. I don't really notice anything wrong with the motherboard so here's hoping it all works or that I can get it to work.
The cat seems to like it.