Rule of thumb:
The value of a replica is based off the cost of the build, accuracy to original specification and cost to replicate.
Cost to replicate can be different than the cost of the build as some parts are harder to re-source than others. In most cases the original owner will lose a few bucks. However the upside is that they all hold value better than typical Detroit or Asian counterparts. High end cars hold value better than hot rod versions.
Are Replicas ever Collectible?
My
opinion = NO! That would be reserved for limited edition cars like the original 60's cars or even the new Ford GT. The 40th year car, R-model, 1000 series, etc are marketing techniques to sell at high prices into an already saturated market.
KMS cost more in the start and generally have more accurate appointents = better value for the buck
A low end glass car with funky paint, hot rodder seats, cheap appointments and low replication value = will be worth less......