Jessica London offers the Ellos Women's Lace Bodice Dress in Black or White for $34.90 plus $7.99 for shipping. (It's available in sizes 26 to 34 for $7 more.) That's $10 off list and the lowest total price we could find. It's available in sizes 16 to 24, although not in all colors/sizes.

Of note, it's also available in sizes for $39.90 plus $9.99 for shipping. That's $10 off list and the lowest total price we could find.