I can however find as many Atari controllers as I could ever need, both locally and online. When considering availability you can't discount the sheer _volume_ of the things that have been manufactured. A truly ubiquitous human input device like an XBox controller is going to be available for a good long time without much extra work. It's well tested against repeated abuse (source: I'm bad at XBox games) and there are millions of the things in existence.