The Return of the Car

It's been a crazy weekend, but to finish off the car story from Friday.
The Grand Prix was returned just over 2 hours after it left our driveway. I wondered if someone didn't have any gas, and just wanted to "test drive" my car so they could run there errons. They made a low ball offer, I just about crapped my pants, I told them my lowest price and they tried to low ball it again. I told them my lowest price, told them I would have the other lady come and test drive it that night, and call the other gentleman back that test drove it that morning and if it was still there I might consider their offer, and I turned and walked into the house. Within a few minutes they were knocking at the door with cash in there hand. After I signed the title and watched the car drive away, I wondered could I have gotten more, should I have talked figures with the gentleman from the morning, and should I have waited until the lady from Adrian test drove it? Too late now, it's done and it's sold.
(I still have no idea where they took it for 2 hours.)