Looks like the going rate for a Model 3020 is about $8000.
The best place to find a John Deere Model A tractor would be on the official John Deere site. Their site would give one information on where a tractor can be purchased.
The John Deere 850 is a compact tractor and the most recent model available is John Deere Z850A. This newer model offers more horsepower and hitching capability compared to the John Deere 850.
The most successful tractor model built by John Deere was the Dain All-Wheel-Drive. The most successful two-cylinder tractor produced by John Deere was the model A. The 730 was also very popular, as was the 4020.
The John Deere H tractor is a model that was manufactured in the early 1900's. With this being said whether or not it comes with spare parts would depend on whom you are purchasing it from. Typically if you receive a fully restored tractor they do not come with spare parts.
1952-1956
1983 Model Year
The first John Deere tractor, which was the John Deere-Dain, is at the Deere & Company Headquarters in Moline, IL. There are only two examples of this tractor known today. Most people think it was the John Deere Model D but the Dain was experimented with long before the D.
It will fit according to John Deere Attachment Fit Guide
600000
595700
The first John Deere tractor to be sold at reputable dealers was the Model D, which was first sold in 1923. For more info on the Model D, see the related link...
A John Deere model M tractor serial number plate is riveted onto the engine block on the left side of the tractor.