Hmmm, interesting, I've checked around some, but still have not ever found a working combine with 15,000 hours on it. Who has one and is that just engine hours and they let it idle alotIJ The way I see it, even at a high annual use of 500 hours per year, that would take 30 years to accomplish, and it would be classified as an antique combine. Inveriably, a combine is going to have a lot of worn out parts, some replaced several times, by the time it reaches 5000 hours. I'd expect all crop and grain engaging parts will have wore out at least once by then. I've seen some run up to 10,000 hours, but that takes new feederhouse floors, chains, pulleys, all new threshing and grain handling components, new unloading systems etc. If you look at the total tons or bushels of grain handled now days verses just ten or twenty years ago, it is no wonder the elevators and augers wear out. Yields are higher, headers are larger, ground speeds have doubled, so now we see harvest rates consistently with a 475R or 9650 up around 2,000 to 3,000 bushel_hour in corn. If you can get the 475R for the same price or even less as you stated, that's the way I'd go, since dealers are equal distance and provide similar service. The 475R tracks alone would probably be worth it in your northern area and again at trade-in time.