That looks like a 1807 Austrian 15 kreuzer. I have one similar to it in my collection. They're neat coins, and have some cool history. They don't have much of a premium though. I'd guess its worth around $5 (without a 19th century reference book, I'm not sure if the date has any special premium).
the most expensive of the 1807 varieties is about $15 in fine (the lowest grade krause lists) in my 2006 copy of Krause.
By the title of your thread, it seems you may not realize "funfzehen" actually means 15. Just incase there was any question, like it's not the name of a country or business.
