Groupon discounts a selection of Masterplug Extension Cord Reels, as listed below. Shipping adds $3.99, but orders of $34.99 or more bag free shipping. Plus, all prices are all-time lows. Each features an LED power indicator, power switch, current overload protection, and reset button. Deal ends October 17. The deals, with prices after coupon, and $3.99 for shipping unless noted:
-- Masterplug Cord Storage Reel (no cord) for $16.99 ($11 off)
-- Masterplug 4-Outlet 30ft Extension Cord Cassette for $18.99 (low by $1)
-- Masterplug 4-Outlet 60ft Extension Cord w/ Open Cord Reel for $36.99 + $0 s&h (low by $2)
-- Masterplug 4-Outlet 80ft Extension w/ Open Cord Case for $41.99 + $0 s&h (pictured, low by $4)

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Note: They're rated for 11 to 12 amps and may not be suitable for power tools and other high-amp applications.