Just found a display of GoPro HD Hero cameras at Costco for $100 each. They are $269 at the GoPro website. That's quite a savings if anyone is interested. I checked Costco online for those without a local store but no luck there.

These are the "naked" model with no mounting hardware.

EDIT:
Okay I'm a little suspicious now. I'm almost certain they were the HD model but after rechecking the GoPro website I found the SD version there for $100. Maybe I imagined the HD model at Costco. Possible false alrm. Sorry. :[