Game dealers will take them but expect to be kicked in the balls on price. But saying that a quid for a rabbit with the puddings out is better than nothing.
My butchers won't take them until autumn so mine go to a BOP centre. For free during the spring and summer.
Come winter it's two and a half quid a rabbit at the butchers.
Folk will also take them for dog jock or fill their freezers for the ferrets.
Plenty of options.