JD does not make a 4230 any longer but I will have to ask my son what a newer version cost.
The newest tractor we own now is a JD 8450 MFWD and I believe it is about a 1985 model - - - we also have a 4010, 4020, 4440, and 4640 the 4010 and 4020 are used mostly in hay

and mowing pastures

as they don't have cabs - - - I believe both of them would bring as much or more that what we paid for them

. The 4440 mand 4640 both have GPS guidance systems on them :roll: as well as out spray rig - - - If you can believe sonny boys numbers the savings in chemicalls and seed paid for the systems in three to five years :wink: and boosted yields as well due to compaction control.
Sonny just called me , I need to sign for the new combine ( we lease a combine with 2 seasons on it each year - - - that gives us a full warranty and latest updates - - - tax deductible) and we will need to take the dozer over there as it is to high to go in the barn. We lowered the floor to 14' two years ago - - -he says we need at least another 6" to get in the door. I will have to go over and see what the fuss is about. Last year he took out the main power line to the town of Greensboro with the anhydrous applicator :!: and now it looks like the combine might be a little high for my taste. :roll: