Not so sure about the Clubs mate, they preceded the Airsporter range if I am not mistaken.
I am not an expert, it's difficult to put a value on things as there are so many 'variables'.
Generally speaking something is worth what someone is willing to pay and the seller is willing to accept!
There does seem to be interest in these old clubs, it's a question of finding someone that wants to buy one!
Similar previous thread.
http://www.airgunbbs.com/showthread.php?558420-BSA-Club
Good Luck!
Airsporterman