Most people understand that like trading in anything used, you get what you bargain for. The quality varies, prices vary and you risk buying crap sometimes. Don't like that? Pay a bit more and buy extended warranty or precertified cars.

To sell your car, there's KBB, carmax, cars.com and any dealer you want to buy a car from.

Beepi was just one of the many options (no hassle no haggle). However, instead of being a marketplace like cars.com, it took ownership of the transaction probably with hopes to take a bigger chunk of the transaction but effectively became a dealer. Car dealer margins are like 2%. At a 5x multiple, it would be worth 10% of Sales.