Erich Stauffer may or may not have been a real person and was probably a made up name to make the figurines seem German. As German porcelain is highly regarded, the name would hopefully claim some panache. Your figurine was made by Arnart, a company that produced such figurines, often copying popular Hummel and Kalk items which were quite pricey. Erich Stauffer figurines sell for between $5.00 - $35.00 depending on demand. Condition is important as well as the legibility of any marks on the bottom of the item. Size and subject matter influence value as well.
You can find a price guide online, but books with price guides may not be relevant in today's quickly fluctuating market. Check for sold prices at online auctions for an up to date value.