Humminbird 535 Portable fish finder

[YpsiBass]

Product manual here: http://www.humminbird.com/WorkArea/DownloadAsset.aspx?id=2914

This is a gently used Humminbird 535 portable fish finder.  320x320 grayscale display.  Powered by two 6 volt lantern batteries (batteries not included).  Has a suction cup to mount the transducer to the hull. Great fish finder for smaller aluminum boats.  Completely functional, nothing missing, all original equipment.  Everything can be stored in the included carrying case that doubles as a base for the fish finder.  

Checked the system status screen and it shows 55 hours total time used.

Asking $100.  Similar portable units are the post mounted type with much smaller resolution and features. Also willing to trade for something I could use in my new bass boat.