I've got a lipstick cam (similar to that one) that I got off ebay for filming my motocross stuff and it is rubbish! The quality is not very good and neither is the sound - and it was $200 not $50!
Take a look at these little gems I found a while back. I just bought one and I'm waitng for it to arrive. Ok, its from HK, looks like a central locking key fob and it's only $10 all up - but take a look at the utube vid, it speaks for itself!
Tiny, 720x480 video quality and good sound. There is an aussie utube vid of some dude that has it strapped to the front of a 200sx and its great. Doesn't even get very effected by the wind which is surprising. (Murphy's Law - I can't seem to find it right now)
One of these would be great for hunting I reckon.
http://cgi.ebay.com.au/SPY-Camera-Mini-DVR-Recorder-Hidden-Video-Cam-720-480_W0QQitemZ190383172780QQcmdZViewItemQQptZAU_Security_Equipment?hash=item2c53b8acac