I just bought one like this.
This link is broken, either the page no longer exists or there is some other issue like a typo.
You can get them direct from China for $17. I put a 8 gig card in mine so its a few hours before it loop records. Picture quality is good enough, not great but i wasn't expecting great. I found a company that just sent me their catalog in pdf. They want you to buy 200 units to get a low price but they will send you single samples to hope to get your business. They have the clip on mirror style for $69 and a few others way cheaper than eBay. Also just ordered a few of those micro rc helicopters Syma S107's 2 for $35.