Walmart offers the Wahl Cordless Beard and Mustache Trimmer, model no. 9918-6171, for $14.92. (Amazon has it for the same price with free shipping for Prime members.) Opt for in-store pickup to avoid the $4.97 shipping charge. That's the lowest price we could find by $8. It features an ergonomic design, carbon steel blades, seven trimming lengths, and memory function.