The scratches do matter, but It also has to be taken into account it's dug because if you send it away to get a professional opinion it's very likely going to be considered cleaned, or having environmental damage, and those words do not bode well for coin values. So if it were mine and it was for sale I'd clean the loose dirt off, take the best pics possible, and just put it out there and let the bidders judge it. Less will definitely be more when it comes to the description on this one. If you look at Ebay's complete listings there's a cleaned one in about the same grade that sold for $500 Ca. Your coin very well might be called cleaned but that's because they look under magnification, where as the ebay one it was very obvious, so with the added eye appeal I think you would do better... but as i said I would not have it graded, and you'd probably do a whole lot better. Depending on the many variables I think you could end up anywhere between $500-$1,000, and there's really no way someone could say exactly how much unless they have the cash in hand and are making an offer. Big numbers always get thrown around detecting forums, but it's a little different when someone is counting out the hundreds for real. I do think if listed right it would bring a pretty good number, plenty good for a dug find!