Susan B. Anthony Dollars
Although not exactly rare, these are coins I have randomly stumbled across. As with most of my coins, I do not go out of my way to search for these.
Other Dollar Coins
These are still seen from time to time in circulation today but dollar coins are not commonly used.
Many of these coins were minted and put into public circulation, however many were created and only released to collectors. If I ever get a complete set I will provide the images here. Until then, you may find images of all of them on the Wikipedia page here.