For Shop Your Rewards members only, Sears offers the D-Link AC1200 Dual-Band Wireless Router for $39.99 with free shipping. (Not a member? It's free to join.) That's the lowest total price we could find by $40. It features 2.4GHz and 5GHz channels and Ethernet.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.