Casio Watch Store

I want to record some videos at high speed like this one:http://www.youtube.com/watch?v=-gttZbYIX… (Firepit Flames Casio EX-F1 @ 300 fps)
How much in UK does the cheapest camera cost to do that with?
I don’t know about FPS but it seems the Canon EX-F1 (used in vid above) is around £500 and captures 300 FPS and upwards, so I was thinking by watching that video I need at least 300 FPS but any help would be appreciated, ideally you would show me one which is cheaper than £500 and still does high speed like this. Thanks.