Yep, there are con artists out there, buyer beware - be informed before you buy.But price can't be the criteria... otherwise, the shady hatcheries will just raise prices on their EE's and say "these are authentic Ameraucana.. see the price tag?"
And with regard to getting blue eggs. If that is what you want, you want a TRUE Ameraucana, Araucana or Legbar. They MUST by APA definition lay blue. Some EEs lay blue. One of my 2012's did (fox food a couple of years later) and one of my 2015's lays blue. The other 3 lay some shade of green. There is no way to tell what color an individual will lay until she lays her first egg.