Hi totally new to this forum, I collect comics and jewelry for the most part. I have this one (yes 1) coin that I am looking to sell. Its a 1908 $20 dollar Gold Saint Gaudens and it was set in a 18K gold pendant frame. I was having trouble selling it on ebay while it was set in the frame pendant so I (gulp) pryed it out of the pendant. Overall the coin is in great shape. It was my dads and he smuggled it out from Cuba in 1961 in his shoe. Its been in the pendant ever since until I just pryed it out. Damage is on the rim/side of coin in one particular spot. See picture #3. These coins roughly sell for $1100-1400 on ebay. Im just wondering how much did I decrease the value with this damage.