GT 186 kit

Hi I have a GT 186 kit still on original 64mm bore (done approx 1500 miles) , includes piston reeds manifold for 30 mil carb and the porcupine head. Im thinking of selling the kit as need funds for other bits but not sure what to ask for it , I only took the kit off to go down the Imola route . The GT ran perfectly whilst on the bike and has never had any seizures etc. Any help on putting a price on this kit would be appreciated . I know 'its only worth what someone is willing to pay' etc etc but I don't want to give it away so as I say any help in pricing this used kit would be welcome.