The individual who sold me my Cannon Digi Troll IV downrigger sold his boat is is unloading these nearly new units. He claims to have put the ball in the freshwater twice. I bought one from him last season and I was happy with it. He wants 750 for each. (The list for a lot more then that 1400 or so) he is also tossing in some attachements.
If interested PM me. These are expensive units with a mini computer module onboad that allows you to program it to cover certain depths and even jig it between two depths automagically but the reason I got one is you can get an optional transducer for it from cabelas which allow it to bottom track. You can keep a bait 3' off the bottom and troll right over a sandbar with hitting the bottom and watch it on your fishfinder.
way cool. He asked me if I wanted the others... He bought 4 and has 2 left. I think one is enough for me at this time (actually, I would not mind having the another unit but I spent enough money on fishing stuff this week and have to restrain myself!
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for the tech's see the cannon web site.