I'd actually like to sell all 3. I just listed them on ebay this afternoon. One is auction style starting at $30 and the other two are buy it now $75 each. Here are the links: http://www.ebay.com/itm/281349019847?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649 http://www.ebay.com/itm/281348891079?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649 The last one that sold on ebay went for $100.
I've got a working display unit and three probes. I believe the probes work because when I put in a battery a red light turns on. I have everything but the receiver that goes on the bottom of the boat. I'm looking to either buy a receiver (looks like a transducer) or sell what I have a purchase something new.