You know what, I have no idea. Never sold one of my lights before. Also don't have any idea what p&p would be from England.
It has original box but not the foam inner. No instructions, I could probably dig out a Jetbeam laynard but may not be the one it came with. Original clip, spare o-rings and replacement rubber. Excellent condition, never dropped and little carried.
PM me a total price you think would be reasonable and you are comfortable with. Weight packaged would be just under 300g I think.
Just looked, Royal mail says around £10 for Int'l tracked and signed for small parcel 300g with up to 50 quid insured.