Amazon dropped the price of new ContourRoam cameras to $110 today. It won't do as much as a contour, but it's great if all you are doing is posting on youtube for shits and giggles. The accessories are more expensive and less plentiful for the Contour.
In it's defense, it's a hell of a lot easier to manipulate a Contour than a GoPro while mounted. The downside is you have 0 configuration options while in the field with the Contour (unless you have an android phone with an OTG cable...)
The Hero 3 Black edition is quite nice with the various modes it offers, and the abundant amount of accessories available. I have had quality issues with the 2 GoPros I have had (Hero2, and now my Hero3 black edition..) with lifespan. The Hero2 died just before its warranty was up, and it's replacement died a month later. At the last track day my Hero3 would record for a couple of minutes, and then shutoff.
I have had 2 glitches with the Contour. The laser aiming assist would turn on while recording or plugged in. It didn't bother me but it was distracting riders when I was out at Deals Gap (and I understand why completely!) The other issue was low mic volume.
If go with the Contour, know that it doesn't do well with wind. They have wind breakers for quite cheap on scamazon.
That being said...if all you want is
[email protected] and a few bucks for a camera that option exists too. Just don't ask me what to search for, other than keychain camera.