There is some place for odd auctions like that, maybe it goes to a very rare engine and some guy out there is slowly piecing together parts for a rebuild, and no one sells them anymore, and here he runs across one, OH MAN, thats the last piston I need!! Only 186$?? Oh man, its my lucky day!!
But of course, with such a bad picture, and no identifying marks, even that unlikely situation could never happen.
peace,
sam