With prices varying by ZIP code, Lowe's offers the Porter-Cable 15-amp Corded Circular Saw, model no. PC15TCS, for $49.98 with free shipping. (Amazon charges the same.) That's the lowest total price we could find by $15. It features a 15-amp motor that delivers up to 5600 rpm of power and torque and a 7.25" 18-tooth carbide-tipped blade is included.