My ex (my son's dad) decided to try to be a car salesman at a Dodge dealership in a busy area.... needless to say, he only did it for 6 months, and could not afford to stay there anymore. His income dropped by about $20,000 from where he was working before. He was working on a small salary and commision. He said the problem was there was a ton of salespeople and just not enough customers to make a decent salary.