Sears offers the Craftsman 16" Reel Push Lawn Mower, model no. LMRM1602, for $89.99 with free shipping. Plus, Shop Your Way Rewards members receive around $10 in SYWR credit. (Not a member? It's free to join.) Assuming you use the credit, that's a savings of $30, and the lowest total price we've seen. It features five helical blades and four height adjustments.
Of note, Shop Your Way Rewards members may be eligible for additional credits and discounts.