TomTop offers the Decdeal 31-Piece Waterproof First Aid Kit for $3.99 with free shipping. That's the lowest price we could find by a buck. It features assorted bandages, alcohol pads, safety pins, sting relief pads, guaze, tape, tweezers, scissors, and a nylon bag.

Note: This item ships from mainland China and requires two to five weeks for delivery. The countdown timer on the product page does not reflect an actual expiration time and resets daily.