You must have gotten the same clearance deal I got yesterday too for $15! Can't beat it! I have not had a chance to fly with mine yet, but looking forward to it. Oh, mine was for the Typhoon H though. I guess this is for a different camera.
I also got the three filter set for 15.00 at Best Buy, a really great deal. The ones I got are listed as working with either the H or the Q500 series. I really like that they are even easier to work with (due to their size) than the stock filter, I cant seem to get that on or off without putting smudges on it.