We had already discovered in Leipzig that fine knives are much cheaper than back home. I love knives for cooking and saw various brands of Japanese kitchen knives. In Weimar there was a little shop specialised in small precision tools for scale model building and arts and crafts (like woodcarving). They also had some very nice kitchen knives.
What to buy: We bought 2 Japanese knives, 33 layers of steel, total price of € 130 (we haggled off € 10!).
Weimar has a nice little pedestrian zone (where you will find most sights) with some small shops. Nothing extraordinary shopping-wise, but if you like old books, you will surely find some interesting shops. Some other shops also sell you some out-of-the-ordinary nice artsy things and of course in the museum shops you will find books about Weimar's famous inhabitants and reproductions of items used in households twohundred years ago. It's also a good place to stock up on your Goethe and Schiller paraphernalia. Still, I wouldn't come to Weimar for the shopping, so don't expect too much in that respect. Indulge in the historical and cultural richness of the town instead.
What to buy: Old books, Goethe and Schiller souvenirs