Examples:

• What do you want to buy at the gift shop?
• What do you want to buy from me?
• What do you want to buy for her?
• What do you want to buy now?
• What do you want to buy?
• What do you want to buy him for a gift?
• What do you want to buy him for a gift?
• What do you want to buy?
• What do you want to buy?
• What do you want to buy?