Home Depot offers the Milwaukee M18 18-Volt Lithium-Ion 10" Sliding Compound Miter Saw Kit, model no. 2734-21HDP, for $599 with free shipping. That's the lowest total price we could find by $100. It features a Powerstate brushless motor, dual bevel with nine detents, cam locking miter system, carbide tipped blade, and Redlithium 9.0Ah battery with charger.
Update: This item is now backordered, but can still be purchased at this price for shipping when available.