A number of sellers at eBay take up to 79% off a selection of new and factory-refurbished Polk Audio equipment, with prices starting from $29.95. Plus, all items bag free shipping. Warranty information varies by item and seller, as detailed on individual product pages. A couple of best bets:

• Refurb Polk Audio Omni P1 Wireless Multi-Room Music Adapter for $119.99 ($30 under new)
• Polk Hampden Powered Bluetooth Desktop Speakers for $199 (pictured, $26 low)