Cheapest at the moment seems to be ~45$.
Xbox 360 wireless controller
Comments

http://www.megabuy.com.au/microsoft-jr9-00012-xbox-360-wirel…
$45.55($9.95 shipping included)http://staticice.com.au/cgi-bin/search.cgi?q=xbox+360+wirele…

not bad. I was thinking of selling my near new controller for ~$40 delivered. but I dont think anyone would buy it.

Also ozgameshop has them at $44.99, I think they do free shipping on everything but I didn't check.
http://www.ozgameshop.com/xbox-360-controllers/elite-officia…

interested to, need another controller

Meh deal tbh, depends how much you value Forza 4 and Skyrim. But I wouldn't personally pay more than 8$ each for those games which values the controller at $42

Yes, but I sold the games on ebay and kept the controller and XBL.

What did they sell for?

I don't recall exactly, but in the order of $20 each.

You could try a used one at EB games
Which shop selling at ~45$?