Amazon has this 4-pack right now at just $7.76.
Additionally, there is a $1 coupon which you can clip below the price, then checkout via Subscribe & Save for a total of $6.37 shipped! ($1.59 per stick)

— If you have 5 or more Subscribe & Save orders, your total will be just $5.59 shipped! ($1.39 per stick)

• Even if you stood in the blast radius of a nuclear bomb, this stuff would not stop working.
• 24-hour odor protection helps you even when dreaming.
• Contains odor-fighting ingredients.
• Old Spice High Endurance Pure Sport Deodorant.