Lots of people have tried to scam and now buyers want proof (most likely a card scan), most scammers get offline when get asked for proofs so this is a method i haven't tested but maybe it COULD work with stupid people (because there's always retarded people out there who deserve to be scammed)
This is my idea about the spectral tiger scam
You will need :
Printer + Scanner
Software like Nero Cover designer or CoverXP (ill explain this)
You are getting the idea i guess...
How-To
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1 - Get a picture like this one http://z.about.com/d/boardgames/1/0/T/n/wow_4.jpg
It should have as much resolution as possible, use google or whatever for more pictures.
2 - Of course, we are going to print it! i suggest using something like nero cover designer or coverxp and do like you want to print a cd cover, but instead of that, compare a real cd case with the one on the screen to get the idea of what size the picture should be, so you are printing a card size picture, not a damn whole page.
3 - Final steps, making it more real...
Go to a shop where you can plastify it (sorry i dont know what's the right word in english, if you dont understand what i mean just check this picture, it looks pretty much about what im talking about http://www.totallycatholic.com/3-21-07/968.JPG) That plastic thing will make it look like its your really precious card and you dont wanna scratch it by accident or whatever.
Use cellotape (http://z.about.com/d/familycrafts/1/..._cellotape.jpg) and a piece of paper to hide the area where the code should be). Think about this cellotape thing like it was social skill, it looks more realistic to see a handmade "device" to hide the code instead of just an ugly red box done with micro$oft's Paint.
You can even spill on purpose a little little little bit of your coffee/chocolate on the plastic so it gets dirty, nobody is perfect right? It will look like you often play with cards or whatever and a little home accident happened, giving it more real appearence. Making you look like a nerd who actually plays with these cards, and that means making you "legit". This depends of the point of view of each person, maybe you prefer to show it in perfect conditions.
Or do anything else at your own style
4 - Find a victim, scam, donate to mmowned
... at least i tried!!