So I'm looking for either a bike-mounted or helmet-mounted camera to record some of my rides and do a bit of v-logging too. I spent a few hours searching the forums here and came up with the two most popular choices, the Contour and the GoPro. At some $300 though they're a bit out of a student's budget, especially since this is a fairly casual toy, nothing too serious. Someone had a thread about the cheap MD-80s from China, but upon researching them they're apparently very hit-and-miss, mostly being knock-offs and whatnot.
So my question is, are there any reasonably priced (say around $100) recording devices out there? Doesn't have to be HD or anything super spectacular, decent is good.
Barring that, does anyone have an old camera set-up (or even an MD-80) gathering dust somewhere that they wouldn't mind selling?