The economics of anvils are complicated. In the past year, I have added a 100 lb. Peter Wright and a 150 lb Trenton to my shop for a total cost of $505.00. They are both in good condition,ready to go. I picked these up locally (no shipping charges) and consider myself fortunate to find them (I searched devotedly).
There are GREAT new anvils made in the U.S. and Europe; $505.00 would make a small down payment on one of these.
It is possible to rebuild an anvil. To do it right is not a small task. Like rebuilding an abused longrifle, the anvil needs to justify the investment. Why put $300.00 into an anvil that was mediocre when new. A Fisher, a Mousehole, Trenton, Hay Budden, or Peter Wright might all justify the effort, but many old abused anvils are now just curios.
If one decides to invest in restoring a worthy anvil, then reading Robb Gunther's article is a good place to start, though not the only way to do it.
And I really do think that your skills,JM, justify and will be well served by superior tools as you can obtain them.
http://www.anvilmag.com/smith/anvilres.htm