You can find out if the JOHN DEERe 850 will suit your needs by going to the deere website to find its specifications. You can find reviews at www.tractor-review.com/john-deere-850.html.
Whether or not Kubota tractors are as good as John Deere tractors is a matter of personal preference. John Deere is a more popular company and generally the most popular companies create the best products; that's how they become popular and maintain popularity.
You can find John Deere Collectibles at the Collectibles store online. Other good places to look for John Deere Collectibles are at Ebay and Amazon both have a wide selection.
tractorhouse.com has a variety of tractors for sale. You can place a bid on the equipment to hopefully get a really good deal! Otherwise most towns have a John Deere dealership.
Your John Deere dealer would be a good place to start but if they no longer have the part available try the guys in the related link...
John Deere 1010 is a popular farm equipment. From searches onlines the John Deere is a good tractor and has pretty good reviews. Therefore, it should be a good replacement of your old farm equipment.
e-Bay is a good bet, either that or try www.deerelydeparted.com
Your best bet is to go directly to a John Deere dealer. This site www.deere.com/ offers a locater for dealer as well a link to purchase links directly.
"Nothing Runs Like a Deere" was always a good one.
The value of any john deere in good condition is near 1000 dollars. These tractors last forever, john deere also has the best reputation. www.deere.com.
You should be able to purchase a John Deere 4720 used for approximately 30-40,000 dollars. It is a good product with a reputable name to back it up:http://www.equipmenttraderonline.com/find/listing/JOHN%20DEERE-4720-96209988
John deere hy-gard or any good trans. Hydraulic oil
I have only ever heard good things about John Deere. So i assume the John Deere 790 is good, but in case you want to check it out for yourself go to this website http://www.tractordata.com/farm-tractors/001/2/2/1227-john-deere-790.html