I have a Helix 9 I bought in April 2024 from BassPro Shops in Hookset NH for a specific missing persons case I was working. Used just twice.
I am not in L/E but do this work part-time as a volunteer. The search was very important and I adpated the hardware to a canoe which allowed me to get into very difficult water bodies to run my scans which I completed that I could not get my usual boat into. I don't need this unit anymore as I already have a Humminbird 1197 that to this day still serves me well, and a towed commercial system from EdgeTech on Cape Cod. I am in Exeter NH not far from Boston.
Email if you like:
Info@SonarSAR.comFull details at CraigsList:https://boston.craigslist.org/nwb/ele/d/exeter-humminbird-helix-sonar/7791425725.html