Sears offers the Black & Decker 20-volt 12" Cordless String Trimmer / Edger, model no. LST220, for $69.99 with free shipping. That's the lowest total price we could find by $57. It comes with two 20-volt Li-Ion batteries and features an automatic feed spool, telescoping shaft, and pivoting handle.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.