I picked up a 145lb anvil in great shape at a local estate sale for $75. I have a log to mount it on, but haven't gotten to that yet. Was thinking of using railroad spikes, but might go with smaller diameter ardox.
Also need to make some hardies. As I was "reserving" the anvil at the sale, waiting for a staffperson to label it with my name, and "sold", other folks were scooping armloads of tongs, hardies, etc. After I took the anvil to the car, I went back for a smaller one that had many chips/chunks out of it. A friend had suggested his son could weld/fill those in shop class. Of course, it was gone when I got back.