If the gun is tight and not messed with, that price is fair to both parties. A few months ago, I grabbed a circa 1929 70% Ideal 16ga FWE with 30" bbls, on consignment in a gun shop that should have known better, for $700. That was an exceptional deal in this area (Los Angeles). If your 70-80% condition estimate is accurate, you shouldn't need to do anything to it other than clean and oil it, and go shooting. The wood finish on mine was a bit alligatored (probably accounts for the attractive price), but some cotton swabs with denatured alcohol smoothed the finish nicely, without removing it. Watco oil and paste wax over that improved the appearance considerably. Check the stock for hairline cracks around the lock plates and top tang. The Ideal grade seems to have better shooting dimensions than the field grade Elsies, based upon my very small sample. Buy it and you will be the envy of your friends.