What is the value of the 4020?s now, I have a nice 71 model I?ve had for a year that I bought for a investment, bought new locally, nice and straight runs great and I was told original paint, has 7445 hours on original working tach, it come from factory with a cab that has been removed and fenders put on, you can tell they have been repainted, but it?s a nice solid tractor, also has original 3rd member, differential lock and dual hydraulics, factory 1000-16 on front 18.4-34 on rear, please give me your input on this tractor as I thought I would have more time to play but hasn?t turned out that way, this was a hay tractor NO front end loader and drawbar wasn?t worked to death, also has front weights