Amazon offers the Coleman 40-Foot Outdoor Extension Cord for $14.98. Clip the 10% off coupon to cut it to $13.48. Plus, Prime members bag free shipping. That's the lowest price we could find by $2. It features a 13-amp rating.
Daniel Hendley (DealNews)
Nice point @jeffreyd00 - Based on the packaging, it seems this is best designed for things like Christmas lights and other uses that need less power.