Coleman Cable 74101 50-Ft Outdoor Extension Cord for $9.99. Order online for in-store pickup at Kmart to lock in the price and save on shipping. Otherwise, shipping is $7.75 for a total of $17.74 shipped. Here is a screenshot for your reference. This outdoor extension cord features 13 amps up to 50 ft. and 10 amps up to 100 ft.