Amazon has the 33.8oz bottle of Nexxus Therappe Replenishing Shampoo for $9.21 - 5% off with Subscribe & Save (can cancel anytime) - $2 off coupon (click "Clip coupon") = $6.75 with free shipping. This stuff is at least $20 at Target (for this big of a bottle).

You must do Subscribe & Save to order this Add-On Item without the $25 order minimum requirement.