This was from a boat on an auction site.  There are 3 props attached to the big gas motor.  Electric I think. I've never seen them before.  It is a 22ft bass boat.  What are they for and why and how much do they cost?  Thanks in advance.

http://s910.photobucket.com/albums/ac301/jrattris/Triton/?action=view&current=9.jpg

That is some kind of rear drive trolling motor.  I have seen them before but never multiples only one unit.

http://www.cabelas.com/cabelas/en/templates/product/standard-item.jsp?id=0001090010738a&navCount=1&podId=0001090&parentId=cat601107&masterpathid=&navAction=jump&cmCat=MainCatcat21276-cat21286-cat601107&catalogCode=IK&rid=&parentType=index&indexId=cat601107&hasJS=true

WOW 165lbs plus your bow mount.  thanks.  I wouldn't think Cabelas would have such a specialized part.  I thought I knew their whole catalogue.