How much would a 9 ounce gold coin be worth?

The spot price of gold (as of January 7, 2009) is US$839 per troy ounce, so 9 troy ounces is worth $7,551. A couple of points to keep in mind: -- The price of gold is very volatile right now, and is swings of $30 per day in the spot price of a troy ounce are not uncommon. -- "Spot" is not really "spot" at the moment; that is, the actual price to buy and sell actual physical gold is rather higher than the spot price (by as much as $50 or more) at which the commodity theoretically trades. -- Coins can have numismatic value above the precious metal value (although that seems unlikely in the case of a 9 ounce coin) -- Are you sure that this "coin" is actually gold? 9 ounces is rather large for a circulating coin.