Id say with any airguns collectible or modern demand has dropped a bit with people being tighter with money , Ive noticed on sales here guns which used to go almost over night quite often seem to take a while to sell. Depends on how keen you are to sell and how long you would wait to sell. Id put it up for sale at what you want now and if it dosnt sell knock twenty quid off and try again and then again etc. Have a lowest price youll sell it for and dont go below that. Trade in for guns at RFD 's at the moment are very low so youll probably do better to sell private. id join BSA owners group and put on there to as you have a audience who are generally just after BSA . Have you also tried Gum Tree/Free Adds you might get some one local who will collect ???