If you want to give your credit card some exercise, head out to Sporgasse Shopping Street in Graz City Centre. Splash some more cash at Farmer's Market on Lendplatz and Farmers Market on Kaiser-Josef-Platz.
Graz Museum is just one of the attractions in Graz City Centre, Graz so you might want to stop by during your trip. If you want to experience more of the culture Graz has to offer, head to Graz Clock Tower, Graz Art Museum, and Graz Main Square.
If museums are on your list of things to see, you might want to browse the collections at Styrian Folklore Museum in Graz City Centre. If you want to see more of the museums in Graz, you can easily walk to Artists' House or Graz Art Museum.