At $4.49 with Subscribe & Save, this Neutrogena T/Sal shampoo comes in well below what you’d pay at your local stores, including Walmart and Target. The maximum-strength formula uses 3% salicylic acid to target dandruff, scalp psoriasis, and seborrheic dermatitis, and it’s fragrance-free with no added color or preservatives. It’ll ship for free for Prime members, too.  Buy Now at Amazon