With orders of $25 or more, Amazon offers the Wahl Mustache and Beard Trimmer, model no. 5537-420, bundled with a Nose and Ear Trimmer for $7.69. Clip the $2 off coupon on the product page to cut it to $5.69. Plus, Prime members bag free shipping. (Non-members can qualify for free shipping with orders of $35.) That's the lowest total price we could find by $2. It features a five-position guide, high-carbon steel blades, and storage base.
Note: This item is part of Amazon's add-on program and can only be purchased with an order of $25 or more.