Ebay offers Woods 100-Foot Extension Cord for $19.19 (reg $40) after code with free shipping.

Apply Code: SUMMERHOME20

Product Description:
Rated to 10A, this 100 foot vinyl outdoor extension cord is helpful all around the house. It has a vinyl jacket that resists moisture, abrasion and prolonged exposure to sunlight. Reinforced blades help prevent accidental bending or breaking. Molded plugs and heavy-duty strain relief protects electrical connections resulting in longer cord life. Outer jacket won't mark floors or walls. This cord is recommended for general indoor/outdoor use and is UL listed, CUL listed, ETL listed and meets OSHA requirements for outdoor use.

• Dimensions (Overall): 100 Feet (L), 1.49 Inches (H) x 1.49 Inches (W)
• Weight: 6.5 Pounds
• Cable/Cord Length: 100 Feet
• Industry or Government Certifications: UL Listed
• Wire Gauge: 16 AWG
• Maximum Amperage: 10 Amps
• Number of outlets: 1
• Number of conductors: 3