[DieselDoctor]

Your tractors are in exceptionally nice shape, and I agree that condition will command a higher price - up to a point. A tractor collection, like anything else will degrade over time, tires will weather check, fuel goes stale, carbs gum up, batteries die, etc.. If you have truly lost interest, then put them up for sale at a price in the upper limits of average. If they don't sell, you can always lower the price a little at a time until they do. Being able to help someone who wishes to ship the tractor(s) will improve your potential for a sale. You also need to be aware that most of the youth today, who will be the homeowners of tomorrow, have little or no interest in things mechanical for the most part. This may limit your potential sales in the future. Only you know what you have in each tractor money-wise and what you true interests are. I sympathize your dilemma, good luck to you!