I think the Go Pro Hero 3 Silver is very good, I've seen people selling them with bundle (extra battery, mount, head strap, stick, extra SD card) for 250-300. Just gotta look on ebay/craigslist for them deals.
I did spot one but have other financial matters to tend to.
256 + tax for just the cam on amazon.
[ame="http://www.amazon.com/dp/B009PK9S90/ref=psdc_172421_t1_B009TCD8V8"]Amazon.com: GoPro HERO3: Silver Edition: Camera & Photo[/ame]
You can probably get the older models + bundle for even cheaper