6pm offers the Mootsies Tootsies Women's Nadra Sandals in Black/Black Elastic or Navy/Navy Elastic for $9.99 with free shipping. (
Bon-Ton offers them in Black or White for about a buck more via "FREESHIP.") That's the lowest total in-stock price we could find by $20, although they were pennies less three weeks ago. They're available in sizes 6 to 10, although not in all size/color combinations.