When it comes to grading I am old fashioned. I hate the MS system especially when applied to foreign coins. I personally grade using the basics: F VF EF UNC and mention all defects. With that in mind I would ask how would other experienced collectors determine the value of a coin, for example a Bavarian 5 mark 1876 in EF that has been obviously cleaned or has a medium size rim dent. For pricing purposes would you lower it one grade or cut the price in half for that grade or...?