Here are two scenarios:

a) You have a rotten car but a good dash with VIN and all appropriate paperwork. Restoration requires swapping virtually every piece of metal costing a small fortune in time and material.

b) You have a good car but no dash, VIN, etc. You find a rotten car with dash, VIN, etc and you slap that dash into your car.

What's the difference ?!?!? End result is exactly the same but scenario b) costs less and doesn't take as long. AND ... this happens all the time. Anyone who doesn't think so is just kidding themselves.