FishFinders & Parts Here you can find just about any accessory for your Humminbird fishfinder or your Fishin Buddy sounder as well. Transducers, mounts, add-ons, etc. NEW LOWRANCE X50 DS FISH FINDER SONAR X50DS. Pricing & History. Sold for. ... Bottom from the actual bottom Selective on / off Advanced Fish Symbol I.D. ™ Selective on / off FishTrack™ Auto and manual zoom bottom tracking, plus multi-zoom push button control Deep, Shallow, and Fish alarms 10 international languages Sealed and waterproof. ... When fish finders are concerned, Lowrance is by far the oldest company. It started operating in 1957 as a Marine technology fish finder. Since its inception in the industry, Lowrance has created a reputation among fish finders and the sonar units. Lowrance is a brand that any person seeking the service of fish finder will never fail to think about.