Where to buy Sacajawea Golden Dollar?

Answer 1

First see if your bank still has any. You can get them at face value there.

There's also a slight chance change machines may have some, but at least those in Post Offices and train stations tend to have more of the Presidential dollars.

Failing all of those, you might be able to find one at a slight markup from a dealer, or near face value at a coin stall in a flea market. Regardless, the coins have no real numismatic value due to the huge numbers minted. The only problem is that so many people think they're rare that any that turn up in change get stuffed in drawers. Strange.