https://cars.usnews.com/cars-trucks/toyota-supra-preview
Based on US inflation now.
https://www.usinflationcalculator.com/
It says $40,000 USD to 2018 money is: $64,254.43
Not factoring in holding costs, storage, maintenance, insurance, registration, taxes etc.. still not a bad return. Better than putting the same money in a bank account anyway.