Don't mean to rain on your parade, but I DID buy a shrinkwrapped barcoded Skiing game from Atari2600.com, and I opened it, because I had to know for sure. And no dice - it was just a regular label game.
Atari2600.com used to have language on their site about the blue label Skiing being in the barcode box, but he took it off after I told him what happened with mine.
I suspect the blue label games did ship in the barcoded boxes, as those are the later release boxes, but there's no guarantee. And at $25 $18 a pop, it could get expensive buying those sealed games and opening them to see.
If I had to to it all over again, I wouldn't have opened the box.