Woot offers DEWALT 60V MAX Cordless Lawn Edger, Tool Only (DCED472B) for $139.99 (orig. $475.99). Free shipping for Prime Members.

Product Description:
Get the adaptability and cutting power needed to finish the job with the DEWALT 60V MAX* Attachment Capable Edger. The high-efficiency brushless motor maximizes runtime and product life while consistently providing the power to tackle tough overgrowth edging and withstand heavy-duty use. Easily convert this edger into other outdoor tools with universal attachment-capability that allows you to connect additional add-ons and take on more work. 

• HIGH VERSATILITY AND PRODUCTIVITY: DEWALT Universal Attachment capability to accept additional tool pieces
• DURABILITY AND EFFICIENCY with 7-1/2 in. hardened steel blade and up to 2-1/2 in. adjustable blade depth
• EASE OF MOVEMENT with large guide wheel for mobility while edging
• SPEED CONTROL FOR OPTIMIZED POWER AND RUNTIME with variable trigger and hi/lo settings
• Battery and Charger Not Included