Well, the provided context is about as helpful as a chocolate teapot for finding actual coin values, offering up a website menu instead of the treasure map. But fear not, as an expert, I can dig into this for you.
Let's clear up the biggest misconception right away: your 1979 "silver" dollar is, I'm sorry to say, a bit of an impostor. The Susan B. Anthony dollar isn't actually made of silver. It’s a copper-nickel clad coin, which is why it never got the same respect as its hefty, silver-filled ancestors. It was the coin everyone loved to hate, frequently confused for a quarter in the heat of a transaction.
Because of this and the fact that the U.S. Mint churned out hundreds of millions of them, a standard, circulated 1979 dollar is worth... well, a dollar. You can take it to the store and buy something that costs a dollar. It's the numismatic equivalent of a participation trophy.
However, don't toss it in a vending machine just yet! There is one specific version that collectors actually seek out. Check the coin for a mint mark near the portrait's shoulder. If it's a "P" (for the Philadelphia mint), look closely at the rim. There is a "Wide Rim" variety where the date is very close to the edge of the coin. This is much rarer than the common "Narrow Rim" (or "Far Date") version and can be worth anywhere from $5 to over $40 depending on its condition. So, if the date on your coin looks like it has a personal space issue with the rim, you might be in luck. Otherwise, you've just got a buck.
