But they do say that copper prices in UNC are for examples with full lustre, so that covers BU. cf. p.446 in the 2009 tome. I never spotted that . But to get me out of the hole I have just dug why do other books state different prices for Unc and BU coins. On another note how can you determine a correct price for a coin with say 25%, 50%, nearly full lustre, or is this left to the seller’s opinion. What I am trying to say is I AM CONFUSED, when I look at one of my coins and one is brighter that the other how do I put a value on the coin when no book can specify this in detail. I think this can lead to confusion for the collector, especially for someone new to the hobby. Forgive me for being a bit thick, but this is the only part of coin collecting that I am not confidant about (grading). I have the 'Standard Guide to Grading British Coins' but to this extent I am still none the wiser. I suppose it’s like buying a car, to the seller the car can look in great condition but to the purchaser it can look ok, until the time you want to sell the car after you have purchased it. Mark