I bought, over a while, passenger cars that were rusted missing parts and many were re-painted by brush. I don't think I paid more than $15 for any of them. Some, sadly gave up parts for those that were saved.
I also repainted and saved the tank car and hopper shown in the display case.
The two repainted engines shown were purchased for less than $100 each, rebuilding them was fun.
All run around my Christmas tree