I have a bunch of repair manuals for lots of different tractors from 1953 - 1981. Most of them I have never seen let alone heard of. I am keeping a few of them like the Harvester and Massey Fergeson ones as I do need them sometimes. But the ones for The Oliver and a few of the others like the one for a 53 John Deere I thought might be worth something. Would it be worth it to put them up on E-bay?