I think one point being made by several posters is that it isn't primarily about money, or at any rate it shouldn't be. In most hobbies the producers make a buck and the intermediaries make a buck; the collectors don't. Are there exceptions? Sure, but they're relatively rare; that's the definition of an exception. Many collectors watch pricing on eBay and apply that to their own pipes. This kind of "marking to market" is highly deceptive; it ignores transaction costs, price volatility, and the huge discounts suffered when a seller is in a hurry. But it's an appealing deception since everyone likes to think they're ahead of the game.
Everyone's got a budget, some number that is "play money" and another number that is more serious; these numbers obviously vary from person to person. The trick is to only use play money on collectibles (or for that matter in casinos). If there's ever a serious chance buying a pipe will damage your ability to put away money for retirement or pay current bills then you have a problem, and I don't mean a financial one.
Everyone's got a budget, some number that is "play money" and another number that is more serious; these numbers obviously vary from person to person. The trick is to only use play money on collectibles (or for that matter in casinos). If there's ever a serious chance buying a pipe will damage your ability to put away money for retirement or pay current bills then you have a problem, and I don't mean a financial one.