What is the value of three Frederick Douglass stamps?

The value of three Frederick Douglass stamps depends on their condition, rarity, and market demand. For example, if they are the 2012 Forever stamps issued by the U.S. Postal Service, their face value is $1.50 in total. However, if they are older or rarer issues, their collectible value might be higher. It's best to check with a stamp dealer or online marketplaces for current pricing.