So, just to offer a counter example....
For years I have opened the bottom of the cellophane with a pen-knife, slid the box out from the cellophane, peeled back the label carefully to open the box and then set the deck into a pre-determined order. I also usually take a moment to put a reverse-breather crimp into the 9C if that will be useful to me later. On very rare occasions I'll put other work into the deck for something special. Another pro tip is to remove some cards and squirrel them away somewhere sneaky for a big finish. The Kings are perfect for this since you can show the AS, 2S, 3S...etc, on the face, run quickly through to the Hearts and show the AH, 2H, 3H,...etc at the top. Naturally everyone just assumes the Kings are in there somewhere.
But I digress....
I replace the deck into the box (careful to replace the Jokers and advertising cards and to use the proper "new deck" orientation) and reseal the label. I then use two spare playing cards as guides to get the box started back into the bottom of the cellophane wrapper. The wrapper is slid all the way down. Most of the time I don't bother to reseal the very bottom of the cellophane (and in fact I remove it entirely most of the time with the pen-knife), but occasionally I will keep it intact and reseal it with some clear glue.
In all the years I've done this I've never once had anyone ask to minutely examine the cards. I remove the deck from my pocket or close-up case (in larger shows), use my fingernail to separate the pull-tab from the top of the cellophane and uncoil the pull-tab. I then remove the rest of the cellophane completely and throw it away. I then slice open the label with my thumbnail and open the cards just like I open every other deck in my lifetime.
The only thing I'll do differently if I've gone to the trouble of completely resealing the deck is to simply toss them onto the table and allow (without encouraging) them to be picked up and examined. I'll sometimes mention that these are "casino quality" cards (if using Bees or Aristocrats) or "my favorite brand" if using Bicycles "because I can buy them at any drugstore or gas station in the country." Again, this implies that they're normal without explicitly saying so. The spectators come to their own conclusions without me ham-fistedly guiding them.
I remove the cards and a few false shuffles later we're off to the races.
The long and short of it is this: I agree that having cards in special orders and/or with "work" in them inside a sealed box/cellophane wrapper is useful. But I'm not about to pay anyone 3-5x what a normal deck costs (I get my cards at Costco for $1.20 per usually) to do it for me.
Jason
PS: Lastly, my method works with every deck, anywhere in the world, with any color you like. No shopping around required.