What is the value of a Olympics US 20c stamp?

The value of a U.S. 20-cent Olympics stamp can vary based on its condition, rarity, and demand among collectors. Generally, used examples are worth a few cents to a couple of dollars, while mint condition stamps may fetch higher prices. Certain limited editions or variations might be worth more, so it's best to consult a stamp catalog or a professional appraiser for a specific valuation.