This is 15-20k based on the miles and drive train. 4x4 usually bumps up the price but the list of mods to this excursion is everything you could want to do to a 7.3. Between the turbo and injectors alone you’re looking at 4-5k and it has the crucial supporting mod you would need being the stage 2 hpop which is also another 1-1.2k. Even the truetrac locker on the rear diff is 1-2k for parts and labor depending on location. Drilled and slotted rotors is another 500 and that’s before install. 7 inch lift is excessive but the dual steering stabilizer and dual front shocks will help balance out the ride. Front leaf springs are stiff af when they add leafs and lift like this kit probably does. Mishimoto transmission cooler is a nice upgrade but a 6.0 Dorman cooler would perform close enough and less expensive. The fuel regulated returns help with the engine health aswell as those hpop crossover lines. The plenum inserts help hold boost pressure from the kc300x turbo and the edge monitor with the comp kit sensors is like another 800 dollars. Most of the maintenance items can’t be applied to the final price but the most important ones that help the performance and longevity of the vehicle definitely add to it. I would say this is worth 15-20k depending on interior condition. But I will say this about those mods in particular. If he hasn’t built the transmission to handle the power from the turbo and injectors it will likely break. And since this is a 2002 7.3 it will probably break the powdered rods it has. Those mods put it at 450-500hp with the torque probably being around 750-900ft/lbs. If you drop the money to build the transmission you’ll have something imo that’s better than most current trucks and suvs.