You never-know what you're gonna find. I think it was Car and Driver, years ago, wrote an article about a NYC area tow truck who did something similar with a grappling hook. He hooked a Ferrari! I suppose it was stolen and then dumped in the water. Depending on what model it was, that could be a very lucrative endeavor, even if it was for parts. Of course, the duration of immersion would have something to do w/it.