Best I can tell you is that it is worth what you are willing to give for it. Where you are located has a lot to do with pricing. There have been many 140 H1 and H3 tractors for sale here the past few years, so it was popular around here when new and it still is. My brother in law has a 140 H1 that I traded to him last year to mow with, it isn't the prettiest tractor but it runs good, mows good, has new bearings on the spindles on the deck.. I figured it was worth $400. I sold a 140 H3 2 years ago that I restored that had a rebuilt motor in it with a good deck for $750, I sold another 140 H3 with a good deck and good running motor last year for $700. The rear wheel weights are around $150 plus shipping on epay, the weights on the front look a lot like John Deere front wheel weights and can be high priced because they are rare and hard to find. The 80 cart can be a little pricey too, depending on condition. I have sold several of the snow blades for about $350-$450 (that depends on if it is a single hydraulic cylinder or 2-cylinder) and I don't have a clue what the e-z-rake vacuum is worth.
The John Deere 140 is a heck of a good garden tractor. They made several attachments for it, like a tiller, snow blower, snow blade, for example, and they made a sleeve-hitch and a 3-point hitch for it too. You can't go wrong owning one of these. I own another 140 H3 right now (I kinda like the 140's) and another hydraulic snow blade.
Edited by Delmar, July 13, 2015 - 11:04 PM.