Auctioneers just read whatever is written on a card. So, it's up to the honesty of a seller, you know? HERE is a great thread if you'd like to learn about Barnevelders and spot a pullet next time!
They look like around 18-20 week old Barnie Roos to me. My girls at that age barely have any comb and it's just starting to pink up, plus yours are missing the double lacing. Plump them up and you might just have some beautiful boys!