For Prime members only, Amazon offers a Optimum Nutrition and BSN Sample Box bundled with a $7.99 Amazon Credit for $7.99 with free shipping. (The credit must be used towards purchases of Optimum Nutrition and BSN products.) Assuming you'll use the credit, that makes the sample box essentially free. It includes 10 sample size products. It's limited to one box per customer.
Amazon offers the Colgate Extra Clean Full Head Toothbrush 6-Pack in Soft for $2.97 with free shipping via the steps below. That's a buck under our January mention and about $1 less than you could expect to pay in local stores. To get this deal: