Truck #3 looks like a LOT of work, if that is what you want, the price is right. #1 is a 60, bigger than #2 which is a C50. That choice seems to me to be between an almost ready to go lighter truck and a heavier truck that needs more parts and work. Any of them is priced about right in my opinion. There is a lot of stuff about each you have not mentioned but that is how I see them. Just depends on what you want to do. Each of them will have hidden problems, that will keep it interesting.