That's simply not true otherwise I would have received a new sealed product.
What you just said, isn't true.
Distributors, by design, will source stock where ever they can get it, if thats a warehouse with stock in Japan, a store in the antartic or direct from the USA, whatever.
What is often available is regional software versions etc, because Sapphire for instance, don't give a crap whose hands the card ends up with in their home, but they want the free game to be the right regional version, or in the right language.
Its very cheap to send out all the cd's to a distributor, to change over if they've got the wrong version of software in.
Then you've got the stituation that, not every company for instances seals the anti-static bag, some do, some don't, some seal boxes but not the bag, some seal the bag, but not the box.
Shockingly, sometimes, they just run out of stickers
Sometimes companies ship the wrong game in a batch of boxes and its cheaper to send the right cd's to the distributor, than have all the cards shipped back, then sent out again
Stuff happens, if the cards broken, faulty, has poo on it, send it back, if theres no sticker, and the card works fine, what the heck is the issue.
Trying to remember, I used to work in a warehouse/rma department for a rival, most mobo's boxes aren't sealed and bags inside often are. Graphics cards usually do have sticker on the outside, not always, most used to seal the anti-static bag. Not seen a PSU box sealed with stickers.
Infact the only product i'd ever be certain would be completely sealed, is a CPU, obviously not an OEM one though
Most memory wasn't sealed either, Kingston, seal the crap out of everything though.