Around 5 years ago I restored a La Pavoni Europiccola manual lever espresso machine to working order. I bought it off of a "parts only" ebay listing for $200. It turns out it just needed new grouphead and base gaskets, some rustoleum, and some simple electrical work (new power switch and thermostat). After getting over the initial learning curve, this machine has consistently given me some amazing espresso shots, all while on a tight budget.
If you're interested in seeing more of these kinds of restorations, check out these videos from the Orphan Espresso guy, who is incredibly skilled:
https://www.youtube.com/watch?v=2_Ymz8YJpcE https://www.youtube.com/watch?v=L_k-08sVlPw