Stop in for a cup of coffee

We have a local person who for years (40) has done nothing but rebuilt alternators. The cost to do mine is $40.
I don't know the history of mine, and wonder if I should just get it done??
I know several people who have used this person and all were very happy with the service.
Only issue would be appearance. Rebuild is likely just functional - not a 'restoration' type service like Hoppy does on distributors