Target currently has Suave Shampoo and Conditioner, 28 oz. for $2.99 each ($0.11/oz).
This is available in "Suave for Men Ocean Charge," "Suave Professional," "Suave for Kids Purely Fun," and "Suave for Men 3-in-1 Citrus Rush." (May have other varieties available that I missed.)
There is also an offer if you buy four, you get a $5 gift card, bringing the total for 4 28 oz. bottles (112 oz.) down to a final price of $6.96 ($0.06/oz). (Offer valid using in store Order Pickup, Drive Up or Same Day Delivery Shopped by Shipt. Not valid on orders using Ship to Store or on previous orders.)