Well being a guy who has bought built and sold his fair share of racecars alot depends on what is there and the quality of the build. Lastly would be an pedigree for a car. As alot of that has to do with the driver or venue being raced. Cage moly or mild? What rear and front suspension? what shocks, what electronics if any, any certified parts up to date etc etc. The fit an overall finish of the car clearly play a roll as well. Not sure I can give you even a close estimate without more details. Could be 10 could be 25