I am trying to choose between a new ,small v8 chevy 4x4 plain work truck, or I can buy for 500$ less a used 2004 dodge v8 with a hemi 4x4, decked out with options I need bedliner, bed cover etc. It has 15,000 miles with clean history. What is your opinion on this please?

Opinion ... I have... That 2004 Dodge has a year use AND two years age on it. How long do you keep a vehicle ? Ten years ? figure the value of those first 2 years, with the security of a warranty. Does it equal the cost of the options you want? Seems like you could get a bedliner & cover for $500. I would purchase the new vehicle.