The first is more of a farriers anvil, I think. You notice I said I think, as I am no expert! The second has some head damage it looks like and the third don't look too bad. Check for rebound and ring with a steel ball bearing about 1" size, or a hammer if they will let you. It is hard if not almost impossible to find a used anvil that doesn't have some edge damage on the head but as long as the face is in good shape you can work around that! If it's damaged then you don't have a flat surface to work with!
I can't see any markings that might tell you more about them! I have a 120# hay budden that I bought a few years ago. Probably paid too much but other than some edge issues on the face, it has been OK! There are some here that are more knowledgeable when it comes too anvils and maybe they will chime in.