Knowing what breeds to chose from would help, but.....
The blue birds are something heavy breed. Not andalusians, they are lighter and have white earlobes. Maybe poor quality orps, marans, ?
Second pic could be light brahmas, but again poorly colored.
Splash laced wyandottes, again.........poorly colored
Generic looking red birds.
Buying these birds will probably give you good backyard birds, nice layers, etc. When I say poor quality I'm referring to how the birds meet the standard of perfection for that breed. None of these appear to be what I'd call breeder or show quality, but should make fine back yard birds.