Ich hätte gerne ein Sonderangebot für Mengenrabatt.

Pronunciation: Ich HET-uh GERN-uh ein ZON-der-AHN-guh-bot for MENG-en-rah-bat

Meaning: I would like a special offer for bulk discount.

German shoppers often negotiate prices when buying multiple items, and this polite phrase is commonly used at markets and small shops to request volume discounts.