I just bought my first electric filet knife, a Rapala Proguide Deluxe that includes 6" and 7.5" kinves, 12v and 110 V adapter, Cig lighter 12v plug, and a carrying case. Some kits also include a cutting board. Mine was $45. As this is my first one, I have nothing to compare it to, but I am VERY pleased with it so far. Been through close to 100 crappie this season.
Jeff