You can try to ask them how sheets are left, although, they might not tell you. Some companies like that do not do product counts. I have no idea why. I asked Syd from D&D to get some numbers for me, but he said he could do that. I respect his choice, but you never know, Alex might just tell you after all. Either way, tell me how it goes!
I dont think it's that they dont know how many decks they've printed, but rather they dont want you to know.
In reality, the large print runs that they have aren't all that "limited", so they choose not to divulge their quantities as a way of getting you to say "hmm... limited? I guess I should get a bunch now before they run out" thus increasing their sale quantities as well as the speed at which they sell the decks.
You hit the nail on the head! Any playing card could theoretically be looked at as "limited", in the sense that the company making them may not be around forever, may change the playing cards offered, etc. Blue and red seal Bikes weren't thought of as rare when they were first sold, but now there's a semi-precious commodity.
At least companies like E are up front - these decks will continue to be printed, those are rare and only X were produced. Most of the other deck dealers won't give up their quantities on "rare" and "limited" decks. That's actually a bad idea, in the end.
Look at D&D: of all the "rare" decks released after S&M v6, which sold out very swiftly, every single one of them is still in stock with the exception of two decks they didn't make, Tungstene and Jerry's Nugget. Some are seeing this as a little embarrassing for the company. I suspect that's why they started offering the other decks, including the Arrcos; to try generating a little extra heat on their inventory of the other decks by association. And they're STILL putting out new decks! When has Dan and Dave ever had more than one deck style of their own making available at the same time before S&M v6? I believe the answer is never...