Orient Asian Food and Gifts is a great little shop to purchase all kinds of spices and everything Asian. I buy my rice there, as well as a chili pepper paste (I use on just about everything!). Great prices too!!!
Hiking and biking are very popular in this area, and Der Rucksack is a great place to buy outdoors clothing and equipment. The staff are very knowledgeable and the selection is extensive. If you're looking for a great pair of hiking boots, this is the place to go.
What to pay: The clothing is average prices, but the equipment can get costly as some of it is high end. You get what you pay for though -- my hiking boots cost me 130 Euro, but they are really good!
In the city center, you can find the walkplatz area, with lots of shops of all kinds. These photos were taken early on a Sunday morning, but usually the area is packed with people.