You bought it used from him 7 months ago and it's been in the shop for 5 weeks? So it worked for 6 months then required more than a month of repair (although some of that time was probably waiting for parts)? I for sure would check it out before you took it home and ask if there is a warranty period. Also have him watch as you thread it and ask how to clean it & oil, if oiling is required. Bring your own fabric and thread and some cookies (biscuits?).