Amazon offers its Prime members the Corelle Livingware Corelle 5-Bowl Fun Pack in Winter Frost White for $17 with free shipping. (Non-members can get free shipping with orders of $35 or more; otherwise, shipping adds $9.49.) That's the lowest total price we could find by $12. It comes with four individual bowls and one serving bowl.
Update: Note that this item is temporarily out of stock, but can still be ordered at this price for delivery when available.