Sears offers the Great Northern Bar-Style Lincoln Antique Popcorn Machine, model no. 6015, for $143.99 with free shipping. Plus, Shop Your Way Rewards members bag around $21 in SYWR Credit. (Not a member? It's free to join.) Assuming you use the credit, that's the lowest total price we could find by $21. It makes about three gallons per batch and features a spot light warmer, stirrer, and pot heater. A popcorn scoop is included.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.