Buying an anvil is one of most flustrating/rewarding things you can do. You need to study the types of anvils that exist, mainly the difference between cast anvils and anvils with a hardened steel face.
What are you using the anvil for? If just forging knives, I find the "horn" of the anvil can be in the way, so don't get hung up on shape.
Wayne Goddard has used a piece of railroad track to forge knives. These can be hardened and will give a decent result. You will work yourself to death quick with a cast anvil as there is little "rebound" from your hammer, and the metal does not move as good as when forging with a good hard face anvil.
The "cheap Chinese anvil" is cast, as are many other anvils. There are tests you can do on a anvil to see how hard the face is.
I got lucky, and found a vintatge Peter Wright in a barn...