9999 Pure Gold Proof Coin Set in Box w/COA. The item "2008-W Buffalo 4 Coin. 9999 Pure Gold Proof Coin Set in Box withCOA" is in sale since Saturday, April 4, 2020. This item is in the category "Coins & Paper Money\Bullion\Gold\Coins".The seller is "crrussel8" and is located in Oxford, Mississippi. This item can be shipped to United States.