I have some extras from my Dr. Barbara Sturm advent calendar that I'm willing to let go of! This is the Darker Skin Tones Hyaluronic Serum 10ml I've added lots of info and reviews in photos. If you have questions I'm happy to help. I'm completely open to offers especially if you'd like more than one. I also have a few full size products if you are interested please reach out. 100% AUTHENTIC Made in Germany note: This one you can't purchase on its own on their website. Only comes in sets or the advent calendars. Sephora only carries the 30ml for $324