Amazon offers the Philips Precision Perfect Trimmer, model no. HP6390/51, for $10.39. Clip the $3 off coupon on the product page to cut the price to $7.39. Plus, Prime members receive free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, it adds $5.48.) That's a buck under our mention from just over a year ago and the lowest total price we've seen. (It's also at least $3 less than you'd pay at a local retail store.) It includes an adjustable length trimming comb and requires one AA battery, included.