Answer - about £200 for a single camera solid state system. Available from :
http://dogcamsport.co.uk/mini-dvr1-m...ra-package.htm
I have a 420 line bullet camera which is used with a cam-corder, and it's pretty good... but not the best.
check out the bottom two videos on this page for an ideaThe more lines you get the better the picture becomes. The £200 kit from Dogcam is very good value for money and with it being solid state, will give a good picture quality no matter how rough the ride gets.
I would suggest ignoring the "all in one" kits like the ones from Oregon Scientfic. The quality of picture can be quite limited, and they're fairly bulky. I prefer the ease of rigging a small bullet camera anywhere on a car for those interesting angles.
Oh and another reason to do buy from Dogcam? The guys who run it are both extremely friendly and will answer any questions you have. look on their site or PM me for their e-mail address.
Hope that helps you!