I AM the muddyfox courier.
That is cool .Wierdly niche enough to maybe be worth some money.But ,as above,not as cool as ,say a '85 stumpjumper.Just because it doesnt say ,er ,'stumpjumper' on it.Deffo worth a spot in UK MTB history.
I would bet in the flesh it's a very nice bit of kit.Werent...