I never kid myself about equipment. I know I am going to lose something if I sell used and buy new. If I can afford it and want to do it, I go ahead. As time goes on, I have a more business-like approach like Gary D and tend to hang on to things as long as they do the job. I am also lazy and hate selling on Ebay. But Don's comments are right on as well, when selling, you have to do so while it still has some value.