I have a moderate amount of experience with these geese as I lived in an area where they came around frequently to hatch their babies. I know they can be agressive, but I took a great liking to them.
I was looking for a younger pair but will take a breeding pair or two.
I have a few acres and completing a 50 x 60 foot pond and was looking to diversify into something other than ducks and chickens. I don't think taking them from the wild would be good for them, or any benefit to me, so I was looking for domesticated or farm grown pair.