Sears offers the Kenmore Elite 2.2-Cubic Foot 1,200-watt Microwave Oven in Stainless Steel, model no. 75223, for $143.99. Coupon code "SEARS5OFF50" drops it to $138.99. With free shipping, that's $101 off and the lowest total price we could find. It features 10 power levels, 1-touch function, and child lockout feature.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.