Costco offers its members the Fila Men's or Women's Trail Shoes for $19.99 with free shipping. (Non-members must pay a $1 surcharge.) That's tied with last year's mention and the lowest price we could find by $10. They're available in men's sizes 8 to 13 and women's sizes 6 to 11.
Street Moda via eBay offers the Lacoste Men's L30 Leather Flip Flops in several colors (Light Blue pictured) for $54.99 with free shipping. That's $10 off and the lowest price we could find. They're available in select sizes from 9 to 13.