I have one that I may be interested in selling. It is not a cheap unit, you can buy a new one for what I will want for mine.
I will get the model and part number so we can get all the specs on it.
Basically, it has a color screen and does both water and land. Comes with most of the USA and Canada pre-programed. Cost $1399.00 when my dad bought it new.
I would want $550.00 for it. If you have any interest let me know and I will get all the specs and post them here for you, or whoever for that matter...