Should I replace or service my Sony TC-WE305 / TC-WE475 decks?

Hey all, I'm fairly new to the hobby. A few months ago, my dad gave me his Sony TC-WE475 deck which I used for casual listening and recording some mixtapes, up until the rewind speed began to fluctuate on both decks. The belts have never been replaced, and he bought it new back in the day so I'm assuming the early 2000s.

The local business that services tape decks quoted me around $200 and potentially a 6-month turnaround. Thinking that was steep and a long time to wait if it winds up being something as simple as a belt replacement, we opted instead to buy another deck off eBay. We got a TC-WE305 which had been listed as recently serviced with new belts. However, this deck seems to have some transport issues. Rewind on deck B does not work almost ever, yet FF does work just fine. As of today, however, it looks like the right take-up reel isn’t winding the tape properly. Every time I try to record, it runs for a few minutes, then automatically stops, and loose tape starts coming out of the right side of the cassette shell.

Since I know the local shop is likely going to charge high and take a long time for turnaround, should I look into replacing the TC-WE475 belts myself? I feel like if I can get that deck working properly again, it is my better option, considering I never had issues recording with it, and also considering the seller from eBay may not offer a refund or servicing. I'm going to try and reach out to him this week.

It can't be that hard of a fix, right? If I wind up needing to look at another deck entirely, I think I am going to look for a single deck rather than a double, since I don't really dub tapes or need to at this moment.