Hi Guys, Im new to the Oliver Tractor.  I've come across a 1939 Oliver 80 standard sitting under a tree up here in Canada. The owner is a friend of mine and is interested in selling it. His dad bought it brand new back in '39, so this tractor has a history with it. The tractor is in very rough shape now, engine is seezed and the body is completely brown with rust. How much would be a fair price to buy it and drag it out from under the tree that is has been sitting under for 15 years? 
Thanks for any advice!
Matt