There are dozens of other sites.
I've got link will take you to a page site which lists all UK auction sites. The only problem is that AB's automatic censorship system won't let me post it! (I know because I've previously answered a similar question and tried to insert the link).
To get this to work, you won't be able to click on this link. Instead, copy it and paste it into the address bar of your browser. Then remove 'DELETE' before clicking 'Go':
http://www.auctionlotDELETEwatch.co.uk/auction s.html
(If you look carefully, you'll see the 'rude word' in there, which AB thinks I'm posting!).
Chris