LOL! Fun discussion!
I think you would have to find an average cost of the popular chargers in a class. Example, say off the shelf turbos are running between 1500-2000. Set a claimer price at 1750.
The idea is, it would stop the guys from taking the 2000 turbo and making it a 5000 turbo.
Stock car racing was famous for a$500 ENGINE claimer races. It keeps someone from getting into things as much.
It would defiantly be something the majority of the class would want, I would never just implement it.