Costco offers its members the Fila Men's or Women's Trail Running Shoes in Gray for $19.99 with free shipping. (Non-members must pay a $1 surcharge.) That's the lowest total price we could find by about $10. They're available in men's sizes 88.5 9 to 13 and women's sizes 6 to 11.
Fila via eBay offers its Fila Women's Lite Spring Heather Sneakers in Gray/Black/White, Gray/Pink/White, or Pink for $24.99 with free shipping. That's $40 off list and the lowest total price we could find. They're available in sizes 6 to 11, although not in all size/color combinations.