The rocks alone would be worth, conservatively speaking, half a million.
6 seconds sound clip from the The Asphalt Jungle (1950) movie soundboard.
You can hear this line at 00:35:24 in the Blu-ray version of the movie.
Quote context
[...]
- He's got a plan, beautifully worked out, for the biggest caper ever to be pulled in the Middle West.
- Only he wants $50000 backing.
- The rocks alone would be worth, conservatively speaking, half a million.
- How much would you get out of it?
- Brother. You're knocking me out.
- What if I were to tell you that I've got a plan worked out to get it all?
- I could tell them that I'd fence the stuff myself, you see?
[...]