@ Gayan
The price range I quoted was 8-12K for a
HEAVILY MODIFIED
example.
You need to understand the amount of money, time, effort, research.. etc that goes into building these monsters. Put it this way some of these demo cars have well over £25K spent on modifications (parts alone). So really you are saving a lot of money by buying it already built.
Trust me there are no shortages of customers for these cars as they are so rare.