I'm a fan, but they are not without their problems. Search forum for kirk revolution so you go in with your eyes open. That one looks in good nick, and about the max price you should expect to pay for it.
They do look cool but it's probably worth a wide berth if you intend to ride it hard in any way. The frames were notorious for degrading and flexing badly...
There's much better out there for £150.00 if you hunt around TBH