First published by Money Metals here: https://www.moneymetals.com/news/2018/09/10/us-mint-sells-out-of-silver-eagles-gold-buffalos-001613

The lower metals prices are, predictably, driving increased demand for physical bullion from U.S. retail investors. Perpetually plagued by shoddy production planning, the U.S. Mint announced last week the government agency is temporarily sold out of silver American Eagles and gold Buffaloes.