You are right Colin. When the US Mint released bags of silver dollars (1964) they had held in vaults since 1900, it had a big effect on the price of some scarce dollars. The 1903-O dollar had a price of $300, at the time, if you could even see the date (G). After the release of dollars, the price for a uncirculated 1903-O was $24.00. The coin has since recovered to $625 in MS-64. A uncirculated 1903-O was $1500 in 1963.