Hobbies to the Extreme

Have you ever had that experience where you're looking for something online (cameras, golf clubs, Starwars memorabilia, etc...), you see a few enthusiast quality pieces priced to the stratosphere and you wonder who in their right mind would purchase them? Do you also imagine that you'll probably never see one in real life as no store would be crazy enough to stock an item with such a limited target audience?
An interesting aspect of visiting the hobby goods center of the largest urban area in the world is seeing specialty shops that wouldn't be economically feasible anywhere else. A prime example is this yoyo shop I stumbled across in Akihabara. They sell yoyos costing as much as $300. I suppose if you are hardcore into yoyoing, this would be your Mecca. There are stores like this for every hobby imaginable. I like to imagine that every person I come across is actually a master of one of these obscure arts making the journey to his or her homeland.