If those are too rich for your pocket and you are only testing the water, how about
http://www.ebay.co.uk/itm/Ansmann-Ra...item5aed45f857
Put some bearings in and get a charger and lipo and you are away for less than £150 or so I reckon.
Ok, you won't win the world championships, but i'ts cheap as chips to buy and parts are dirt cheap too.