68 fastback cuda opinions please?????

Sounds like somewhere between a 8K and 14K? car. That seems like a huge spread but need to see pictures. And the fact that it is not really turn key right now is an issue. There a lot to the teething issues of a freshly built car. It's not a $20K car.

Really depends on the quality of the paint job and a complete detailed list of new replaced parts. Does it have a $2K paint job or a $10K paint job? And sounds like some of those new parts could have been installed 10 years ago give or take.