We actually have a picture of how much it was:
Moldovan intelligence officials say they have seized an ‘imposing quantity’ of radioactive uranium from a criminal group and detained several people.
The Moldovan Intelligence and Security Service said the uranium was due to be sold for £154,000 but did not say how big the haul was.
In a statement, it said ‘a criminal group specializing in smuggling radioactive substances was uncovered’, adding that ‘members of the group were found to be Moldovan citizens’.
Eyeballing it, I dunno. Half a kg? So you’ve only got to do that 50 more times and you too could have enough for a bomb. Assuming that it is HEU rather than LEU of course.
And I really do tend to think that you could do more damage in other ways for that sort of amount of money.
There was actually a big report a few years back about the radioactive smuggling stuff. I found it all most interesting myself for I have smuggled nuclear materials (that is, things that can be used in nuclear, not radioactive things. 40 tonnes of nuclear grade zirconium out of Russia and into being made into AlMag car wheels for boy racers was a particular favourite. My actual trade in radioactive things has all been entirely, even scrupulously, legal. Including police car outriders with sirens whooping and all the rest ). As far as I recall absolutely every buyer was the security services of one country or another. There just is no private market for this shit.