[1985 CCX]

I agree with Bill,
Replicas are worth the sum of their parts........ or what one will pay.

I do differ with respect to authenticity portion. Cars that are clearly without identity crisis, ie: street interior with S/C stuff, tend to command greater prices.

For example: (not picking on MFG just examples)
ERA, street interior, 390, dual carbs, pipes, no roll bar, bolt on wheels, std jag rear, stripes will command less than equal ERA in full 427/428 street or S/C trim.

CSX6000 car with a Boss 351 will not command the price of the same car sporting SO.

Then again, all these fall into "Replicas are worth the sum of their parts"........ or what one will pay
Guess pick the right manufacturer, make a plan, stick to your goal and enjoy....