I was quoted US $10.25 (to AU) for a similar sized light, so that gives you a ballpark at least.
If will be $48.52 tomorrow at TMart. (tomorrow will be November 9, 2012)
http://www.tmart.com/ShopWays/Daily-Deals.html
See why at this forum postings
One advantage to TMart is that if you live in the U.S. and it ships from the U.S. warehouse (it does) you can get it in 3-5 business days