The dealer says $3500, Edmunds, CARS and LetFord say $4500

I'm getting sick of this stuff, but here's what I found on Edmunds and it agrees with what Ford's site and how I read the CARS site say;

1997 Isuzu RodeoLS 4dr SUV 4WD

It appears your vehicle qualifies for the C.A.R.S. program based on the information you selected.
Combined Fuel Economy† of My Trade-In ............. 16 MPG
C.A.R.S. Category for My Trade-In ......................... Category 1 Truck
Data provided was for the following configuration:
Engine ...................................................................... 3.2L 6-Cylinder
Transmission ............................................................ 5-Speed Manual
Drivetrain .................................................................. Four-wheel drive
Note: If this is not your vehicle's configuration, your vehicle may not qualify under the C.A.R.S. Program. Search for your Combined Fuel Economy at the EPA Website. ( I checked here too )


2009 Mercury MarinerPremier I4 4dr SUV AWD (2.5L 4cyl 6A)

MPG of New Vehicle:
-->
Estimated Credit†† Based on New Vehicle Selected: $4500
MSRP: .................................................................... $27,240
Combined Fuel Economy† of new vehicle ............. 21 MPG
C.A.R.S. Category for new vehicle ......................... Category 1 Truck

Yet my local Mercury dealer is telling me it's only $3500.

Now, when I punch the new Chevy Equinox in it's also $4500. Who's going to get my money?