I'm surprised they are that expensive unless folks are raising the prices as BTC value rises.  I bought three for ~$25 each in Sep or Oct.  Might want to keep searching.

Even at $25, breaking even seems hard at this point unless you park them on an alt coin that will rise relative to BTC someday, which is how I made back the cost and then some.  My erupters just solo mine now hoping for a lottery win....