Walmart offers the Wahl Ear, Nose, and Brow 3-in-1 Personal Trimmer for $6.50. Choose in-store pickup to avoid the $5.99 shipping charge. Excluding the below mention, that's the lowest price we could find now by $2, although we saw it for a buck less in May. This wet/dry trimmer comes with three detachable heads with steel rotary blades. It requires one AA battery, included.

Note: With orders of $25 or more, Amazon charges the same with free shipping. (This item is part of Amazon's "add-on" program and can only be purchased with orders of $25 or more.)