I bought a new mounting plate, power cable, and trolling motor transducer for my Helix 9 SI that I had. I have sold the boat before installing so don't need it. I did put the transducer on the trolling motor once when my rear transducer mount broke for one trip until my new mount came in. Other than that it is all new. I gave almost $200 for all of it. Will take $140 shipped to your door if you want it.