I have done business with Sparks and DNI for years and have bought many cars and trucks from Sparks; I also have them service all my vehicles. The owner... of the business talked down to me and treated me like an idiot. I don't dress like I am wealthy and I am not the most learned man but I have been successful enough I could write a check and buy his dealership. I don't care who you are YOU DO NOT talk down to customers. As much as I like Mike the service manager I will never go back. My next car will not be a Cadillac and my next new truck will not be a GMC.