eBay with Factory Authorized Outlet has the DeWALT DCB118X1 9.0Ah MAX FLEXVOLT Lithium-Ion Starter Kit for $120 - 10% off with coupon code PLAYOFFS18 [Exp 1/15 at 8AM PT; requires Paypal] = $108 with free shipping.

Includes a 20-Volt/60-Volt 9.0Ah Lithium-Ion Battery (DCB60920) and the 20-Volt MAX Fan Cooled Fast Charger (DCB118).