A best bet is the Sur La Table Nonstick Muffin Pan 2-Pack (pictured) for $17.99 plus $6.50 for shipping. That's $12 off and the lowest total price we could find for this set.
Of note, Sur La Table continues to run its Pot Rack Sale and Clearance promotion, with discounts of up to 75% off. That also ties last week's mention as among the best offers we've seen on sale and clearance items from Sur La Table in recent months. (We last saw up to 80% off sale items and up to 65% off clearance items in October.)