How much for that tactical nuke in the window?

Tactical nuke have been an old school staple in science fiction. There was a movie about an expidition? to Mars that involved defeating a Jaws like creature with a head like Godzilla, Silent Running had convient nuclear charges on a Commercial freighter, the Predator seemed to use the smallest possible tac nuke as a weapon of last resort.<div><br /></div><div>So my question is how much to buy a pocket nuke in setting?</div>