Are all of these NOS tube inventories real? How have we not consumed them already?


As I've been shopping for new tubes for my preamp, I've really begun to wonder, wouldn't the current and recent population of audiophiles of the last few decades have bought and used up most or all of these vintage NOS goodies from all of the current inventory, secret stashes and newly discovered cases of NOS...?

What's your take?
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@dill I concur the Matsushita 7DJ8 is an excellent tube sadly it's increased quite a bit in price from $35 to $50 per tube. My preamp uses 6 so it's now sadly out of my price range, at least these days.
Thanks all. Yes I was asking about new old stock not NIB. The whole NOS moniker seems to be everywhere from 5-6 large scale retailers and many other smaller specialists. 
I was able to get what was listed as new old stock circa 1969, with measurements and a taxonomy of the screen printing on the tube that I cross verified prior to purchase, and after 4 days use it really is beginning to sound amazing. 
Ironically though, after buying what was marketed as a single item, the dealer has more... so I thought hmmm.