Hi JohnnyScience,

Both myself, MyBitcoinMint.com, and Coinabul.com sell gold and silver bullion in exchange for Bitcoins. Admittedly, Coinabul is the current market leader and sells gold and silver bullion/coins/bars/etc. We sell silver and gold coins that physically resemble the Bitcoin image. Our prices at the moment are within ~2.5% of each other (our prices are currently price pegged to USD, Coinabul has priced at a floating spot rate).