They're well-financed and very slick.
5 seconds sound clip from the Die Hard (1988) movie soundboard.
You can hear this line at 01:03:24 in the Blu-ray version of the movie.
Quote context
[...]
- We must have the detonators.
- They got missiles, automatic weapons and enough plastic explosives to orbit Arnold Schwarzenegger.
- They're down to nine now, countin' the skydiver you met.
- These guys are mostly European, judging by their clothing labels and... cigarettes.
- They're well-financed and very slick.
- I've seen enough phony I.D.'s in my time to recognize that the ones they got must've cost a fortune.
- Add all that up, I don't know what the fuck it means.
- But you got some badass perpetrators, and they're here to stay.
[...]