Amazon offers Prime members the Aller-Ease Naturals Organic Cotton Allergy Protection Standard/Queen Pillow for $8.26 with free shipping. (Non-members can spend $49 or more to qualify for free shipping.) That ties an October deal and is currently the lowest price we could find by $4. This washable pillow features 100% organic cotton, recycled hypoallergenic fiber fill, and "allergy proof" fabric.
Update: Note that this item is temporarily out of stock, but can still be ordered at this price for delivery when available.