No. I do not sell any tractors or parts. TractorData.com is an encyclopedia of tractor information.
I strongly recommend you contact a dealer first. I believe that a reliable local dealer is the best source for parts and service information. I have three tractors that are over 50 years old, and I still can get parts from my dealer. I realize this does not work for all tractors, and many manufacturers have disappeared. If your local dealer can't find the parts I might be able to recommend a few places. Be aware that I do not have any "secret sources", I search around with Google just like everyone else.
I don't know.
Many discussion forums and advice columns have a standing rule against this question, and will refuse to answer it. If you require an actual apprasial, contact a local farm auctioneer. Most of them have apprasial services.
Tractors, especially old tractors, vary in price a lot. Much more so than automobiles. I have seen the exact same model of tractor sell for significantly different amounts just because it was a different day, different city, different buyer, whatever. If you have something newer a local dealer will probably be able to give you a trade-in price. Just like automobiles, it will be lower than what you might sell it for yourself (the dealer needs to make a profit).
If some relative left you an old tractor and you don't know anything about it, you can drop me an email. I might be able to help you out. While there are a few rare antique tractors that sell for tens of thousands, there are many more that are not worth much more than scrap iron.
The manufacturer serial number should be able to tell you when your tractor was built. I list serial number information on the site. For most tractors, they are sequential numbers and I list only the first number for each year. So, if 1980=1000 and 1981=2000, then a tractor with serial number 1205 would be from 1980 since it is between those numbers. Be sure you have found the serial number for the tractor, and not an engine serial number or a casting number. If I do not list the serial numbers for your tractor, email me. I might have them even if they are not online yet.©2000-2019 - TractorData™. Notice: Every attempt is made to ensure the data listed is accurate. However, differences between sources, incomplete listings, errors, and data entry mistakes do occur. Consult official literature from the manufacturer before attempting any service or repair.