But they're not done: Charlie asks what made Sawyer do all this. "How does someone think of something like this?" Sawyer says, "By way of answer, watch the final flashback!"
Back to Sawyer telling Cassidy to go. She does, and Sawyer walks out the front to the black car, and we tellingly have not seen Gordy at all. So Sawyer gets in the passenger side, waits a moment, and looks over at no one. There's no one there, even though Sawyer is actually glaring at the empty air. Then he counts to himself, quietly: "One Mississippi, two Mississippi, three Mississippi, four Mississippi " and we still hear him counting "five Mississippi" as he re-enters the house, strolls into the dining room, and retrieves from under the table a black duffle bag, filled with presumably the actual six hundred grand.
And he goes to leave again, but in case you're wondering whether he was kidding about having at least some feelings for Cassidy, he notices a picture of the two of them together, and he stares at it for a long time before turning it face-down.
But shit, that makes things worse, if you ask me. He told her about the scam and got her out of harm's way? He could have done that and let her keep the money. He didn't. He conned her. He's a bigger prick than Charlie is.
Or, as he puts it to Charlie back on Craphole Island, "I'm not a good person, Charlie. Never did a good thing in my life." Charlie stares at him, horrified. Shut it, Charlie. I'm still mad at you.