Im concidering purchasing a 2008 F-250 crewcab short bed 4×4 lariat with 82k miles from a friend for 25k. It has dpf and egr cooler deleated and was done at 55k. Truck also has bullydog programmer full mbrp exhaust system and firestone airbags with onboard compressor and studded heads leveling kit,20inch moto metal wheels and 35 toyo open country tires. This would be the first diesel truck ive owned. Would any of you concider 25k being a fair deal? Any issues with the 6.4 that i should know about? Things to look for? Any input greatly appreciated! Thanks!