Depends on the hatchery. I think there might be one or two that sell Ameraucana but MOST will NOT be Ameraucana even if they have them listed. If they have BOTH Ameraucana AND Easter Eggers (don't know if any do) it would be a fair bet that they are true Ameraucana. I got my birds from Ideal Poultry in Texas. I asked the question in an email, it didn't matter to me but I was curious. The reply was that there is no Easter Egger breed (which is true) and they are Ameraucana. WRONG WRONG WRONG. They don't match any Ameraucana color so they are NOT Ameraucana.
I'll pay for your Ameraucanas if Tractor Supply is selling REAL Ameraucana
Given how many birds they sell around the country and how many Ameraucana are actually being bred, I am quite confident my wallet will stay closed.
Then there is the question of sexing. I don't know what TS claims nor how accurate they are but most of the hatcheries claim a 90% success rate. I got lucky, all 12 were girls. Of course statistics says someone else that got a dozen ended up with 2 cockerels. So be prepared. Unless you buy sex linked chicks, you will not know what gender you have and will be posting pictures in the "what sex is my chicken" threads fretting until they mature. I speak from experience
You can change your profile to say where you live (as detailed or not as you like) so people can answer questions without having to ask. For instance, a guy posted his mostly built coop and asked for constructive criticism (and listened!!!). Someone asked where he was located and made another suggestion based on that. The suggestion would have been made by the earliest responders if his location had been in his profile.
Bruce