So you are saying that one person checked 20 dealerships and one of those 20 was willing to sell the exact same car as the others for $5,000 less money? I will buy they might well have discounted the car $5,000 and that was $2,000 more than the next cheapest. I spent forty years owning new car dealerships and it didn't happen! One dealer does not beat everyone else by five-grand unless there is something really wrong about the scenario.It is the exception but one can find one dealership that is willing to sell one car at a seemingly unbelievable price. I saw one Chicago area dealership do something similar recently as well.
It is usually due to some extraordinary circumstance. It happened to me when I bought my 2010 Outback and on a rare occasion I have sold a car or two like that.