AI on budget (used) hardware

Wasn’t sure exactly where to put this as it seems like this should have it’s own “channel”. Please share the details of purchasing, assembling, running and training. Specifics would be wonderful, for example, I ran x model on x hardware with the following specs and achieved the following results.

In the process of building a machine based on “stuff” I found on Ebay. Very curious to see what everyone else is doing with their local setups.