Twertsy: of course you know that more than just GJ members see your post and can check Craigslist in VA to see what you are seeing. that aside let me give you my 2 cents.
the back of that Peter Wright looks thicker than any I've seen or owned. while i'll be the first one to want to buy an old anvil and especially over 200 pounds i might want more information on that one. it looks like it might have had some face added on to the top so i'd want to know if it still had a rebound.
did you know that if an anvil has been in a fire that they can lose their rebound and basically be about the same as a big piece of RR track?
take a steel ball to bounce off the top to check the rebound and sound if you do get to see it in person.
here's a few pictures of a few of the Peter Wrights I've owned so maybe you can see their design. they are all 100 to 177 pounds so not quite as heavy as the one you are looking at so google to see if you can find a few in the 250 to 350 range that i think look the same as mine.
good luck,
D