Virtual Exchanges via eBay offers the Billabong Women's Beach Dunes Sandals in Black/White or Cognac for $14.99 with free shipping. That's the lowest total price we could find by $9. They're available in sizes 6 to 9.
L.L.Bean offers its L.L.Bean Women's Two-Eye Canvas Deck Shoes in Natural or Navy for $39.99 with free shipping. That's $20 off and the best price we could find. They're available in medium and wide sizes 6 to 11, although not in all color/size combinations.