I actually think retailers stopped selling them, after Wave 1. Sucks, I know.
That and there seems a surprising ammount of 2nd market buy ups too. Toys in general seem to not follow any pattern. My local Walmart loaded up with TDK, Toys R Us just has a couple pegs and doesn't even have any Indy stuff, very bizarre. Hopefully the MM's do well enough they buy the next wave with Two-Face and all.