Just spotted these. It appears to be a show exclusive of just the heads ..or head-bust as Prime 1 are calling them.
I'm assuming they are 1/3 scale.
Getting hold of the Harley blowing bubble-gum would be quite cool, as that the only thing i like about the Prime 1 1/3 statue
Blame it on the image, but the Joker head doesn't look like the usual full on Prime 1 1/3 quality?
..maybe they are quick knock'em out for a show quality
Maybe they are smaller than 1/3 scale?