Debating if I want to check this guy out. We all here the it 750lbs or at least 500lbs bs. I am guessing based on the damage and tape measure it’s more the likely 350lbs max thought? 

Not 750#.  500# anvils are usually more than 30" long unless they are a cube.  Looks like a crisp 250# Peter Wright with a busted tail to me.  Tall step too, look for repairs.  What's going on with the smaller anvil in the left of the photo?

Was around  250lbs What he wanted for it was unrealistic for an anvil in that shape. The one too the right was an early us trademark Hay Budden. Weight was probably in the 100lbs range. He also had a 40lbs Vulcan and a dozen stakes. Didn’t want to sell the quality stuff just that anvil.

Any weight stamping still visible?

I'd say the face has been milled. You look at the table and it's saddled and mushroomed, but the face is flat with sharp edges. That doesn't add up to me.

That doesn't bother me as much; if this is a PW, then the table is a softer material anyway and would be more likely to show wear than the hardened face.

I understand the difference in hardness between the table and face, but edges of the face just have a look of been used and then milled, especially the front far corner. Could just be the lighting, but milled would bother me.

The guy said he ground it down. Intentional or not didn’t like how he presented it for sale just shady. I walked away from it. I was the first one to see it he had no interest in lowering the price after he misrepresented it stating he had four other people willing to buy it. One day later he dropped his claims of weight from 750 too 350 still doesn’t weight that maybe 250lbs and dropped the price from 750 to 600 but still way to much for a ground down broken heel anvil in my opinion. 

Good move, I would have walked away also.