Welcome to BYC! In a moment of weakness (and some curiosity) I also bought some "Asian Black" pullet chicks from TSC. While they are mostly black, I have three distinct feather colorations in mine, so they are mixed breed somethings. Most of them have some red around the neck, like black sex links, but more of it. One has a bit of white under the chin, One is pretty much solid black, one has completely different feather markings, fine penciling like in a partridge colored bird, over the black. I got mine in August, and I think they are mostly pullets, two are still question marks as possible cockerels, but honestly I still am not 100% sure. All of them got combs very early (all single combs), and I thought I had a big batch of cockerels for a while. Now I'm pretty certain at least 6 are pullets, time will tell.
We're so happy you've decided to join us 
BYC is a helpful site providing all the information you need to know about poultry! There is always space for more members on the BYC roost!
They look like black australorps pullets to me. Hope you enjoy it here as much as we all do!
