When it comes to someone selling chicks to you for $20 a piece....take it to heart, it's the difference between getting ripped off and walking from a bad deal. Most hatcheries sell Americauna, these are EE's. Some people buy them thinking they are in fact Ameracuna. Again it would help so much more if everyone was just more honest. Again if you just want something to lay pretty eggs it doesn't matter though I still wouldn't spend $20 for an EE.
If you intend to get into breeding and selling chicks it will matter a LOT and is the difference between making you a good honest breeder or killing your reputation as a breeder.