Walking through the centre of Oberursel this morning, I spotted the following discounts in local shops. All are valid until the end of the Hessentag, although you should contact the shop directly for further information.
Kamm & Scherer – all hair cuts are at half price
Minoo – 50% off everything
Naturläufer – 10% discount
Mann Mode für Kinder – 50% off a range of items
(All of these shops are in the Vorstadt or just around the corner in the Strackgasse).