A nuke probably $8mil. They will likely have a damn good reason for whatever they are buying if it's expensive enough.
(I can't see a random unstable nutcase coming up with $8mil for a nuke. It's even hard to imagine someone like that coming up with $1,000 for a machine gun.
You have no imagination or common sense. You think there are not unstable people that are rich or have vendetta or agenda. You're as naive as they come. You must just be a troll to say this utter nonsense.
Sure, there are rich people with agendas, but they typically want to keep their money and power. Nuking people tends to go in the opposite direction for them, both financially and health-wise.
I guess maybe some old fuck who failed near the end of their life and just about lost all his money, but still owns a nuke, may want to go out with a bang... I guess I would have to hope that whoever comes to try to repossess his items will start with the nuke though.