Search forum on "Blackhawk torpedo", "Black hawk torpedo" and "Nuggies." Several members own them and those threads will be informative for you. We've also had a few fun threads here watching how high the torpedoes go on eBay or CL when they pop up there. Someone will correct me if I'm wrong, but I believe the high price is $760 so far. As always, value depends on completeness and condition. To wit, we've also seen them go unsold at $500 when the reserve was not met. Hence the calls for pics.
Forgive this caveat if it doesn't apply, but if this turns out to be a ruse by an eBay seller to generate sales interest on a discussion board, I will be sorely ticked off, so I sure hope that's not the case.