Exclusively for Prime members, Amazon offers an 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 similar sports nutrition products.) Assuming you'll use the credit, it's tied with last month's mention and makes the sample box essentially free. It includes eight or more items, with products such as whey protein powder, protein bars, fat burner capsules, and amino supplements. It's limited to one box per customer.

Note: This item ships in one to two weeks.