Crocs Outlet via eBay offers the Crocs Unisex Beach Line Flip Flops in four colors (White/Navy pictured) for $14.99 with free shipping. That's the lowest total price we could find by $9. (For further comparison, we saw three pairs for $40 with free shipping in July.) They're available in men's sizes 4 to 13 and women's sizes 6 to 12, although not in all gender/size/color combinations.
Crocs Outlet via eBay offers the Crocs Women's Rhonda Wedge Shoes in four three colors (Nautical Navy / Stucco pictured) for $19.99 with free shipping. That's the lowest total price we could find by $9. They're available in most sizes from 4 to 11, although not in every size/color combination.