It is also important to recognizr that dealer invoice is not dealer cost. The manufacturer can and does routinely hold back an amount that is then given back to the dealer provided several key data points are adhered to. These can be satisfaction surveys, sales volumes, captive financing, etc. these amounts can exceed $1,000 per unit. Service and used cars are where the money is made. I have several friends who own multiple car dealerships. As long as you manage your money properly and avoid utilizing too much debt, it is a license to print money. One friends dealerships averages 40 cars per day....run those numbers.