With orders of $25 or more, Amazon offers Prime members the Andis Trim 'n Go Personal Trimmer 10-Piece Kit in Camo, model no. 22580, for $2.02 $2.12 with free shipping. (Non-members can spend $35 or more to qualify for free shipping.) Excluding what you'll spend to bump your order over $25, that's the lowest total price we could find by $19. This cordless trimmer runs on one AA battery, although it's unclear whether it's included.

Note that this item is part of Amazon's "Add-on program" and can only be purchased with an order of $25 or more.