It's not as much the quote as the gesture that goes with it --->

In GFII, when Michael is meeting with Moe Green ...

MICHAEL
Is my credit good enough to buy you
out?

MOE laughs.

MOE
Buy me out?...

MICHAEL
The hotel, the casino. The Corleone
family wants to buy you out.

It's here that Michael smoothly flips his lighter. HIS HANDS MOVE WITH PERFECTION. The quote and gesture go hand in hand [literaly]. PERFECT. So cool.