used sony asv15, even the wifi version, will run appx $100 used and possibly with extra stuff... I got asv30, which is the after version, for $125 or so with extra stuff.. and the video quality more than I need.....
I have used it on helmet.. underwater.. etc.. lol here are some samples..
Link to original page on YouTube.
Link to original page on YouTube.
Link to original page on YouTube.
Link to original page on YouTube.