The Helix 7 seems to have more than one version and some of the places selling don't seem to include the transducer or power cables or mount. I have seen prices from $780 to $1400. there's mega di, mega si, g4, g4n
This just gets more confusing the more I look. I will have spend some time on the Hummingbird site reviewing all the options. Maybe before next spring I will have an idea of what I want.