Anybody know anything about this specific unit? I have a chance to pick up a new (in the box) Humminbird Matrix 67 black & white Fish finder / GPS trackplotter for $200. Originally $499.00. Seems like a good deal, but this is a discontinued unit (last year made 2005). It was lost on a shelf at Gander Mountain for years & they just pulled it out thus the deep discount. It is old enough that I can't find much for reviews. Just wondering if anyone has any experience with these. It has a slot for the MMC memory card (it uses Navonics Gold or Hotspots MMC cards only) any thoughts on those cards/maps? Here are some other specs: power 500 Watts (RMS) 4000 Watts (peak to peak) Target separaration 2 1/2 inches. LCD 640V x 320H. I'm a little leary of a unit this old so any feedback would be helpful.