On my mind recently: does anyone have thoughts about buying instruments as an investment, to keep (and not play?) for a certain amount of time, and sell once it has gained value? Are there instruments (I'm thinking of guitars) that are almost certain to appreciate, so that as an investment they're as close to a 'sure thing' as one might imagine? What about, for example, Martin limited editions, the signature models? Not that I have any money to invest anyhoo... Don