eBay with vipoutlet has the Milwaukee M18 FUEL 18V Brushless Cordless 14 in. Abrasive Cut-Off Saw (Tool Only) on sale for $179 - 10% off auto-applied in cart = $161 with free shipping.  

• Up to 200 steel stud cuts per charge, 5" Cut Capacity, includes RAPID STOP Blade Brake safety system.