In reply to emitto: I just sold our old shoes on here when we had a major clear out.
In these austere times there are normally beginners or people running climbing clubs who are very happy to pay a few quid for second hand shoes. I sold at least 8 pairs for varying amounts from nothing (except postage) through to £20 depending on condition. If I remember correctly, someone bought 4 or 5 pairs for a climbing club.
There is a good chance someone will reply to this thread, but if not, you don't lose anything by listing them on the For Sale/Wanted forum either for free or for fairly nominal amounts depending on your preference.