Let me start with a story, I worked at Electronic Boutique many many moons ago, back before it was even called EB.
It was common practice for use to open games and reseal them for whatever reason. Back in those days NES games were sealed with a line seamed right across the rear of the shrink wrap. I am sure this was some kind of basic or cheap tamper attempt. One of the other guys I worked with and I got to talking and I said I could easily reproduce that, and proceeded to do so by creating a multi-piece wrap and re-shrinking a game.
So with that being said, and myself having recently having sent a game to WATA (that is 'factory' sealed) to have it graded, I am a little disturbed by the sealed and graded offering.
Personally I am not to worried about the game I sent as it was one to have cased for display personally. But knowing what we did on a 'lets see if I can do this' back in the day and seeing that a paper-label sealed Super Mario Bros, was purchased for 100k$, I have to wonder what is really in the 'sealed' boxes.
When I sent my sealed game I was on the fence about actually requesting that WATA actually open the game upon receipt and grade it as CIB, to me that would actually be safer and then 100% known that it really is what it says it is.
I look forward to hearing peoples input and opinions on this, I am not trying to start a problem or fight I am actually interested. i have never seen a discussion on it before.