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 ties with our mention from two weeks ago and makes the sample box essentially free. The box 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 five to seven days.