The N6 was made reliable witht he "series III" updates in the '82 (?) model year. The '85 is the last of the line. I just got 1 last season, and had pretty good luck. Some things to think of and check- dear support, feeder chains (there are 2), rub bars and helicals, accelerator rolls. If you go with it, you will find that the N6 is a LOT of combine. I have that figured out going from a '76 L to '87 R60 and back to '85 N6.