Johnny's attitude is commendable IMVHO. some users may not even bother to ask permission, if it's true that dishonest users have tried to package and sell freestuff items in collections at warez sites.  however, $25 is a bargain, if all sales are attributable to the promo renders.  those cars are so finely detailed that the creator could sell them here along with the Ford, chevy, pontiac, audi, benz and other trade-mark/trade-dress autos, which means he could have asked for a percentage of sales rather than just a one-time $25 fee.