When you agree to buy something for Crystal Energy, and then put Crowns in the window instead of Crystal Energy, you're not being clever, you're not being sly, and you're not ripping me off... because you're not the first person to try it. Not even the 100th. It's an old, old scam, and you'll have to be dealing with a pretty inexperienced trader for it to work at all.

Deal honestly, or get lost.