This is a story my friend Phillip told me a few years back. He told me he was looking for a new car, and being poor at the time he couldn't find much. He went to some lot where the guy had sold cars in his spare time, and he called about a certain car that he was interested in. When he had got there, the car was running.
So he thought that was a little weird, so he turned the key to shut the car off. He turned the key again, and the car wouldn't start. Anybody with a IQ of 70 or greater would realize that the guy had jumped the battery before Phillip arrived. He was hoping he'd get the car and have to get the new battery himself. Phillip stupidly got the car anyway, but the guy got him the new battery. Didn't matter too much as the car died a few months later.