Great suggestion, I will add that;
- Super cars are sometimes available in the f6 credit store for a limited amount of time every so often
- Auctions and raffles happen to allow more people access to them
- Private sales do happen and are high value due to limited availability. I personally like this as it gives a big money sink for those long term players looking for something special to own.
- Some cars considered "supers" were recently added to dealership, tanking the price and perceived status as a super car. This could mean now that people don't consider them special.
Overall, the limited quality and special looks is usually what makes it worth the money. Once it's not worth as much or easily available it's less attractive to buy.