I am looking at these combines coming up at 2 separate auctions. The 2366 has 2400 eng hours and is well worn, I would expect all the internal threshing parts would need replacing, as well as the clean grain and the unload auger are worn through and fixed with duct tape. The 1666 has 1100 original engine hours and was used on a 100 acres of grass seed harvest most of it's life, I expect it would go straight into the field. I think the two combines will end up about the same cost. Probably 40 to 50 thou for the 1666, and 30 to 35 initial cost plus 20 thou for a rebuild for the 2366. I am looking to get 10 years of harvesting out of them at about 80 hours a year. Which would you go for?