I often buy machines that need repairs because they are much cheaper and i get a kick out of fixing them.
I have benefited from a lot of support from ARC members. I try to pay those debts back/forward by doing repairs for other people. There are many in the vintage/retro community who do this. Andrew P and Daniel immediately come to mind.
This sometimes gives me the bonus of working on machines that i don’t own and has included a Lisa, A2000, X68000, 128D, Computer phone, ECS 4500, Microbee etc.
If i agree to do the job there is no labour cost, no warranty and no time limit! There’s no harm in asking, particularly if you have something interesting. No recaps though; i loathe them.