Amazon offers the Makita 18-volt LXT Lithium-Ion Cordless Coffeemaker, model no. DCM500Z, for $41.44 with free shipping. That's $34 off and the lowest total price we could find. This coffeemaker can run off an 18-volt LXT Li-ion battery (not included) or AC power and features a permanent drip filter, boil dry protection, and battery protection system.
Note that this item usually ships within three to four weeks. Need it sooner? Tools Plus Outlet via eBay offers it for $44.99 with free shipping. That deal ends September 29.