Ebay offers Refurbished Ego Power+ Multi-Head System Power Head for $109 (reg $149) with free shipping.

Product Description:
This item is sold as a bare tool, battery and charger sold separately. Power, versatility and convenience are all here: you don't have to choose between them. The power head is the heart of your Ego power+ power head system. The hi-efficiency brushless motor makes the most of any Ego 56 Volt arc lithium battery (available separately). Take advantage of one or all of the full assortment of Ego power+ power head attachments: pole saw (PSA100), edger (EA0800), string trimmer (STA1500and pole saw extension pole (PSA1000). You have the flexibility to choose what you need and when you need it. Factory Certified Reconditioned Compatible with all Ego 56 V arc-lithium batteries & chargers Attachment capable, works with Ego power+ power head attachments Factory Certified Reconditioned