1 One dollar Bill USA Real Money $$$

[Klaus]

The transaction costs would make this a prohibitive way to launder money. If you knocked over a 7-11, you'd have to make about a hundred of these sales just to launder that much - imagine if you were selling drugs, or robbing banks for tens of thousands, or millions! Even 10s or 100s would require a huge number of transactions to launder any useful amount of cash, and I can't imagine a more conspicuous way to do it.

This is the part I found odd about it - any kind of scam that works one dollar at a time takes a long time to generate any significant payback.