We recently decided to get rid of the few thousand hardback fiction titles we had stored now that we are stocking more paperbacks. We put 8-10 in a library carrier bag with the category on the outside and sealed them so no-one could see what actual books they were getting. We then sold them in a "Bag o' books" promotion for £1 per bag. We sold around 300 bags this way and only have around 10 left (all romance interestingly...).
Shoe Lane Library