This is a good place to advertise it - when you have settled on an asking price start a new sales thread.
I hesitate to put a value on it because my valuations have been a bit off beam of late.
But FWIW (and since I'm opinionated and can't keep my views to myself ) I would say somewhere between £275 and £375. They are quite scarce although this one has a bit of surface rust, so the condition could be better.