Whisker has launched its full Litter-Robot Black Friday Sale two weeks early, with up to $150 savings on bundles and $200 savings when buying two Litter-Robots together. While the standalone robots are keeping to their full prices as always (aside from the reconditioned unit deals below), new model deals start with the Litter-Robot EVO 3-year Warranty bundle for $668 shipped, down from $698. While we did see the price drop as low as $599 earlier…