Look here, amigo. You've got the wrong idea.
3 seconds sound clip from the The Treasure of the Sierra Madre movie soundboard.
You can hear this line at 01:08:28.140 in the Blu-ray version of the movie.
Quote context
[...]
- Oh, throw that old iron over here.
- We'll pick it up and go on our way.
- You go on your way without my gun and go quick!
- All right. All right. Vamonos para atras. Para atras todos.
- Look here, amigo. You've got the wrong idea.
- We don't want to get your gun for nothing. We want to buy it.
- Look. I have a gold watch with a gold chain, made in your own country.
- The watch and the chain, they're worth at least 200 pesos. I'll trade you for your gun.
- You better take it. That's a good business for you.
[...]