I've just bought a sony mini dv cam off ebay, has an AV in to plug in a bullet cam, and it only cost 300 quid - has nightvision too for all those midnight runs, will post some footage as soon as I get a clear screen
Its this one 
A bonus using a cam on track is you can get your laptimes (accurate to 1/25s) by using a reference point eg start/finish line, and you can als o work out where you can make time
[Edited on 18-8-2004 by DJ Tera]