Arm & Hammer anvils were made from wrought iron with tool steel tops and they have very good rebound. I have a 150 lb one that I recently paid $375 for which was a very good deal where I live. It has a 90 percent rebound. Sales prices will vary according to location. Check in over at iforgeiron.com, you will get a lot of replies with guidance but people will be reluctant to give a price as like I said price is location dependent.
Although not a Peter Wright, the A&H is highly regarded and should bring a higher price than other less desirable brands. They are not as refined looking as some other brands of lower quality but don't let that fool you, the quality is there. Look for a serial number on the front of the base near the bottom.
There is another anvil called a Vulcan that has a arm and hammer logo on it but has nothing to do with the Arm & Hammer company and is not anywhere near the same quality. (see pic)
If you have a true A&H, in my area anyway, I would price it at $3.50 to$4 per lb to start. Just because it's a great anvil. And people are paying it.