Neon Mart via Amazon offers the Lighting Ever 4-Mode LED Headlamp
, model no. 3200001, for $7.99. Coupon code "lelight0" cuts it to $5.99
. Plus, Prime members get free shipping
. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $5.22.) That's the lowest total price we could find by $3. It features an adjustable head strap, four lighting modes, and requires three AAA batteries (included).