For sale or trade is a Humminbird Helix 5 DI GPS CHIRP Gen 2 fish finder/graph. No issues with the unit. The link below will provide more specific details about the unit.
Included are as follows:
-- Humminbird Helix 5 DI GPS CHRIP unit
-- Power cable and transducer included
-- Railblaza mounting unit
Note: I also have not mounted the unit on the Railblaza mount before so some fitting may be necessary.
https://humminbird.johnsonoutdoors.com/fish-finders/helix/helix-5-chirp-di-gps-g2$225 shipped. I would also be willing to trade for a similar priced scope, preferably at least a 12x power (maybe Leupold, Nikon, Vortex).