I can't speak to your situation, but those numbers would make it make sense. I've bought a lot of cars, including an f150 a couple of years ago and never saw anything like that. Sounds like that dealer is trying to bludgeon someone on a used truck.When I bought my F150 a couple years back, the difference between a brand new truck and a two year old model with ~20K miles -- same bells and whistles -- was roughly $2,500. 100% worth it imo.