Just checking out NCIX's newest flyer and they have "recertified" 360 controllers on for $25. When I visited the page they had 60 left. Might be worth it, haven't checked out what shipping would be but for local pickup probably would.
http://www.ncix.com/products/index.php?sku=41781&promoid=1016
http://www.ncix.com/products/index.php?sku=41781&promoid=1016