I don't think a bank would have a clue what you're talking about when asking for a star note. It's just a matter of when & where you'll find one in your change. Otherwise, you just gonna have to buy 'em. Whenever I sell them, I put them in a currency holder which costs about $1 and then store them. I sell them for FV+$2. $1 is for the value of the currency holder.
I'm kind of surprised that star notes have the increase in value that they do. I get why higher quality grades make a big impact....I get low serial numbers....but just because a note was a replacement (and there are so many of them) you would think it would be only a minor bump in value..?
It's more of a cool novelty than anything else. They make great gifts and can even be a leverage to start a kid in collecting.
There you go !! Also, so many people don't know anything about them and are so surprised, and interested, when they first hear about them.
Some years ago, I did research on the Star Notes. Here's what I put together: https://secretsofandstoriesonuscurrency.blogspot.com/2015/02/what-is-star-note.html