You don't need more than 1/4 lb if you are doing 6 dozen. Those kits say you can only do like 2 dozen. Trust me, it goes a long way. I bought 1 lb and have flocked hundreds of decoys and still have alot left. Pre prep of the decoys is very important. Wash with a good oil removing soap and dry. Apply a thick heavy layer of rustoleum. Not that it's dripping but a heavy coat. Hold the head over something to catch the extra flock and dump it on heavy. Some people like to press it in, I just do 2 coats.
Bought mine on ebay for cheap.