if you really look, you can find used vx2100's for pretty cheap, but they aren't gonna be 150 bones, unless they were hit by a car. your best bet is to save up some more skrill. honestly, it's really not worth filming if you're using anything less than that sony or a canon gl2.
^ what about panasonic, they make some really good cameras, better than the GLs, im getting the AG-DVC30 which is a solid camera for like 1,300. I dont know much about cameras but im beginning to educate myself, ive used it and it is really nice.
Im not sure if he needs a vx2000. If you are just gonna be filming to have the video of yourself, and do some edits, you dont need a $1000 camera, you could get away with something small. If you wana do something more serious, you may want to consider something like a vx2000, gl1, or something like that used.
For skiing I think they are relatively the same, because you have the snow to white balance off of making it easy to obtain a good picture. But anyways, with 150$ you could try and get an Optura 10/20...it might be hard to come across a deal like that for the camera but it is definately possible, it won't be new though.
thats a shame that its all that you know because you are not correct. not only do most digital cameras record sound, if you buy decent batteries they can last a long time. and as for 20-30 seconds, well thats just compleate malarky