That can be a nice addition! All the cars look similar to the Hot Wheels cars. Still it would be nice to have an achievement like that in Rocket League. When you get a certain level, you get a Hot Wheels car. I am sure that it would be selling on the
rocket league trading website for good money. I am constantly buying stuff on that website because I am not that good. I just don't want to wait for cool items, I am not even sure if I would be able to get them.