The Wahl Peanut is what I use and recommend. I've used this one now for 5+ years. Walmart may have a better price, or even a beauty supply, mine was only about $25, but that was over 5 years ago. It's the perfect size for my hands, other brands can be too big/bulky for small trim jobs.
Amazon.com: Wahl Peanut Professional Clipper and...