Net Grade= Discounted Price ?

There will always be a loss of value due to "problem coins". Corrosion is a major problem. It would have to depend on the severity of the corrosion whether there is pitting or not. Some coins are just plain rare. For example, look at the 1793 Half Cent. Almost always found with problems yet, commands a huge price. Just depends on the rarity of the coin (population figures, supply and demand). Cleaned coins will hold there value again, always nicer to have an original coin with no problems obviously, but again, some coins are just always found with problems. When you find a rare sought after key-date without problems, they will always command a higher price tag.

Thanks for opinions. I seen a capped bust 1/2 dime that was AU 50 details cleaned and corroded. corrosion didnt look bad, actually couldnt see any in pics and cleaning didnt look to be harsh. It seemed like a decent price. Just wanted to see other opinions.