I remember back in 60s my brother and I would go to local Ford dealer to look at their back row of used cars. They would gives us keys and set of jumpers let us look and test cars if we found one interested in a dealer plate was provided. We bought a few and flipped them . Had more fun than profit. Have the memories for profit. Dealerships were not big just local family owned for generations. Did see a lot of rare cars like full size buicks with standard transmissions. Bought a non running corvair spyder from Texas for $100 all it needed was clutch. should have kept it among many other present day classics I saw. Still have memories