Usually, shopping at the Viktualienmarket in Munich is pretty expensive. Unless you go to Fruit & Vegetables Sutor where you get 50% off on Saturday afternoon, two hours befere closing.
And you can try and ask for reduction also at other booths. When they sell perishable things, you might be able to buy cheap. No wonder since the market is closed on Sundays. And on Monday, people in Munich expect fresh food again.