You think that only happens to YOU? It happens to everyone. We aren’t going to the car lot to find this stuff. This stuff is 50-60 years old and when purchased they were used for daily transportation, pulling trailers and boats and doing everything. Most of them weren’t purchased to sit in the garage so that 50 years later they could seek it as new.
You have options. Either lower your expectations, spend more money, be willing to do more work or some of all of those.
Or find a new hobby. You always say WHY you can’t find something. That’s an excuse. If you want it bad enough you’ll figure out what to do.