HappyBaseFun via eBay offers 6 Reusable Smart Sheep XL Wool Dryer Balls for $7.06 plus $1.69 for shipping. That's $3 under our October mention, the lowest total price we've seen, and the best deal now by $3. They purport to naturally soften laundry without chemicals or synthetics.

Note: This item ships from China and will take two to eight weeks to arrive.