Are Sacagawea dollars worth anything?

Are Sacagawea dollars, which were first introduced in 2000 as part of the United States' dollar coin redesign, considered to have any significant value beyond their face value? Are collectors willing to pay a premium for these coins due to their unique design, which features Sacagawea, a Native American woman, and her infant on the obverse side? Additionally, are there any specific factors, such as mint marks, condition, or rarity, that could potentially increase the value of these coins for collectors or investors?