Worx via eBay offers the refurbished Worx 20-volt GT 3.0 Cordless Trimmer/Edger with two batteries, model no. WG163, for $44.99 with free shipping. That's $84 under the lowest total price we could find for a new one. It comes with a trimmer spool, charger, and two batteries.
A 2-year warranty applies, although it's not clear who provides it.