...and it assumes they don't click into the SECOND page of results.Good points @ed.brooks , though one point on your "...5% click rate, a 4% click rate, and 2.5% click rate...", that would be assuming every vehicle on the SRP belong to that dealer. Since SRPs are made up of varying dealers, I'm not sure the number of vehicle per page matters as much. I agree that VDP is one of the money metrics, but you gotta get that shopper to choose you first.
Your point about "winning the click" is huge. Pricing and Merchandising play a huge role in winning the click. I have a dealer group that has two stores located less than 15 miles away from each other. Same make. One store does a better job of putting up multiple quality pictures, writing great comments, and pricing more of their inventory in the Good and Great categories than the other -- it's not surprising that the first store wins more clicks.