Wish I had some helpful insight, but I'm a newbie hunter. However, if they are "tank trash", I would gladly take them off your hands. I dont have any decoys!
Bufflehead decoys are awesome to use especially if you have buffies where you hunt.
+1. I don't know if I've ever seen any other duck flock to its own kind more than buffleheads. A small group of buffies on the edge of the spread and they will land next to them there dang near every time.