What are the best ski cameras under $100?
Are there any decent ones(under $100)?
Should I go used?
How much does the editing software cost?
I like the Panasonic SDR SW20. It's waterproof and shockproof. It's also cheap and relatively small. I'd bet you could get one on Ebay for under $150. It's not HD, but for the money and the indestructibility who cares? I'm not planning on selling or broadcasting this footage. If the footage is really good or unusual it won't matter anyway.
GoPro standard definition camera for $99. I'm under the impression that the GoPro has a built in battery heater so you don't have to worry about the batteries freezing while skiing, which has been a problem with me trying to take photos with my regular digital camera.