I got a clone for £50, good quality although some of the machine edges could use a little sanding, lightly cut myself a few times. The originals are discontinued at present and the new version isn't expected until spring.
Suppose £50 not too bad. I spent almost all of that on a used gold lighter from eBay before so as long as your getting good use from it what's the harm.
Hopefully I'll get a lot of use from my pro-tank but if it ever goes t*ts up I'd definitely consider the Kayfun for it's higher quality.