Ending today, Macy's offers the Martha Stewart Collection Collector's Enameled Cast Iron 6-Quart Round Casserole in several colors (Cranberry pictured) for $59.99. This $20 mail-in rebate drops it to $39.99. With free shipping, that's $140 off list and tied with our mention from February as the lowest price we could find. It's oven-safe to 500°F. Deal ends April 23.