Overlooked niches often hide among collectors, enthusiasts, and underserved buyers. One of the most interesting parts of marketing physical products is discovering who actually buys. Often not who you predicted. Or at least not ONLY. Through experimentation, odd patterns emerge. Like the customer with a closet full of premium pillows who still wants to try one more. The barbecue collector who buys every new smoker and grill just to experience it once. Or the guitar player who owns a wall of...