GearXS via eBay again offers the The Original Best Bamboo Memory Foam Hypoallergenic Queen Pillow for $18.99 with free shipping. (The king size is also available for $6 more.) That's $1 under our February mention and the lowest total price we could find by $8, outside of the mention below. This hypoallergenic pillow comes with a carry bag and purports to relieve symptoms of asthma, snoring, insomnia, and neck pain.

A close price: Universal Direct via Amazon has it in Queen for $19.99 with free shipping for Prime members.