Which is interesting to note since a majority of the other weapons the former Soviet Union had made their way into several revolutions happening in the Middle East and Africa via several well known international arms dealers.
Not sure if it was just operationally unfeasible to move something like a ballistic nuclear weapon, but from what I can gather, it was one of the few things that wasn't sold off en masse after the collapse.
The Soviet Union (and America) made hundreds if not thousands of tactical nuclear weapons. These were very small; you could put many of them into a single standard shipping container.
During the 90s there were persistent rumors that some of these had been "lost", but as far as I know these rumors were never substantiated. If in fact these weapons didn't get stolen/sold, we probably have numerous intelligence agencies to thank.