Well alot of dealers are not taken back these gas guzzlers as trade in anymore. Most people who are in high loans with late model trucks (suv) it works out cheaper to get rid of the vehicle and take a smaller more fuel sipping vehicle. Cause they save money on insurance, less cost of ownership since fuel prices keep going up. Remember 93 octane will go up the most and if your vehicle takes that the more you keep paying, when you use 87 it will go up only at a slower pace to get to where 93 was.