I have some old beat-up foam decoys that are held together with black safety pins, monofilament fishing line and super glue. The paint is coming off, and my jake's beard is taped on. I've had gobblers strut within feet of them for several minutes before taking a dirt nap.
That being said, they have been replaced since then. Not because they no longer work, just because I'm a sucker for new and neat.

I think those decoys will do fine.
rw