We raised 10 geese for the first time last year, we charged an average of £30 depending on size, I think the smallest was £28 and the biggest....we kept for ourselves!! They went like hotcakes at that price.
As we didnt plan it too cleverly and were all quite busy in the run up to Christmas we found a local chap to kill and dress them that was £8 per bird, but still a good profit on each one considering they mostly lived on grass.