Her Batman Gambit in "Ducky Mountain High:" Scrooge found gold trees growing on her land adjacent to his and "tricked her" into trading their land because he thought the gold deposit underneath the trees giving them their color must be there, too. It's not until he starts digging that he finds out what Goldie knew all along — he now owns the land with the gold trees, and she now owns the land with the gold! And she rubs it in Scrooge's face while flirting with him!
Scrooge: Why you poker-face prospector! You knew about the trees and the gold all along!
Goldie: Well, who do you think sent you that gold stationary to lure you up here? I've been working on a way to get your land for months. Now I've got a gold deposit, and you've got a lousy bunch of tree stumps.
Scrooge: Oooh... Goldie, you're a dirty deal-maker!