Exclusively for Prime members, Amazon offers this Dog Food and Treats Sample Box bundled with an $11.99 Amazon Credit for $7.14 with free shipping. (The credit must be used towards purchases of similar dog food and treats.) Assuming you use the credit, that's essentially a profit of $4. (It's the best deal we've seen for this sample box, and costs $5 less than our mention from two weeks ago.) Each box contains six or more samples from brands like Blue, Natural Balance, Cesar, and The Honest Kitchen.

Note: This item usually ships within one to two weeks.