[Build-It-Break-it]

I'd never buy anything with paint and definitely not from ebay. Not for anywhere near 20k

If you buy Anything painted it would need to be fully documented with A LOT of before pictures.

I'd try to find one in the 10k range to build and change body panels if you have the skills. But once you start tearing a 40 year old car apart your money starts to disappear fast. Pucker your B Hole.