As a majority, product knowledge isn't that paramount. I took pride in knowing my vehicles inside and out, but I seriously doubt it gained me too many sales. There's a saying in the car business, "Buyers are liars". They said Joe Smuch across town offered me xxxx for my car, what are going to do? "Sir, I appreciate the fact that price is important to you, as it's important to all my customers. Have you given thought to where you rather spend your money? ". I always found that the people that beat be down to invoice or less and ran me around the lot for hours were the worst customers ever. They'd come back every week complaining about the car or the deal and I regretted not just sending them away. Those who paid the sticker price or in some cases, more, loved me and told everyone about me!!! Go figure! Product knowledge only comes in handy when you have a car freak like us, but like you said, most of us know what we want and what we're willing to pay and we have set the internet on fire. I'd look more for a pleasant person who is willing to listen to you without saying you're crazy and who isn't being obviously pressured by a overly aggressive sales manager trying to stick you in a car. Hopefully you don't have a trade in.