There is a 'Want to Sell' section here on the forum that it might be worth you trying - you can also trade, if there is anything else you are looking out for. If all else fails pm me as I buy them, so long as the price is not too rarified! Obviously the lenses need to be good (no significant scratches or chips) for the scope to be worth something, as the lenses are what it is most useful for.
Incidentally, I think you'll probably find it says No42 or No53 on the scope, although other similar number designations exist in smaller quantities.
ATB