I am looking to get a large cent from 1798 as part of a type set (I posted on here trying to find one, so feel free to let me know if you have one you can part with). Anyhow, it seems like many of these coins have environmental damage/corrosion. How does that generally effect the grade and cost of the coin? For instance, if the coin has G details or VF details to it but has some pitting and corrosion how much does that (as a rough estimate)lower the cost of the coin? I know it depends on the extent of the damage and the eye appeal and the individuals judgement, but I am just looking for some guidelines. I am heading to a show next month and will be hopefully checking out a few of these large cents and want to be able to make a fair offer. If anybody has some photos, please feel free to post them on here to help clarify things a bit. Thanks!