I found this site looking for info about a fuji supreme I just aquired. It needs a little work but rides good just the way I got it. I wonder what year it is? Serial # KH203306. I paid $70 dollars for it. Is that close to the value? SJF
I don't know the Fuji line, ut $70 sounds reasonable for almost any bike that rides well. The value can be impacted quite a bit by where you live.
THe fact that your bike has safety brake levers, and stem shifters indicates it is probably not a high end bike, so you probably didn't get a killer deal, but as I said, any good riding bike is worth something.
Stop by the Classic & Vintage forum and there is a subforum for asking about the value of older bikes. Someone there may also be able to help you figure out the age too.