Amazon offers Prime members the Crocs Unisex Duet Wave Flip Flop
in Espresso/Khaki, Black/Charcoal, Nautical Navy/Concrete, or Candy Pink/Plum for $10.50
with free shipping
. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $5.48.) That's the lowest total price we could find by $9. They're available in women's sizes 6 to 15 and men's sizes 4 to 13, although not in all color/size combinations.