A good anvil is the center of a Blacksmith shop. I am luck to have found a number of good anvils. I have hand forged Bickerns, Peter Wright anvils from England, a Vulcan made in the Mid-West, and a Kohlswa from Sweden. You only need one anvil but hunting for them is something of a sport!
Here in Northern New York our towns and farms have been in use for more than 200 years. They were settled in the golden age of Blacksmithing and before the Industrial Revolution was fully underway. Half the settlers of my region were coming from New England or more Southern parts of New York. The tools that they brought with them may have already been generations old. In my travels I have seen everything from pre-1740's English anvils with no horn or hard hole to anvils made in my lifetime. Compared to the West Coast this is an anvil rich region.
I have anvils from 250 years old to about 50 years old! My main shop anvil is the youngest one. The 113kg. Swedish Kowlswa is cast steel and was made in the 1960's. I bought it from the original owner. While it is around 280lbs. it is the London pattern. That makes it fairly narrow faced and long horned for it's weight. Good forge work doesn't require a large anvil. Historically a lot of small town Blacksmith shops used a 125-150lb. anvil. But a larger anvil is steadier when using a sledge hammer. I like this one.