Not quite. If you ordered one set, it came in a sealed, addressed, stamped envelope. If you ordered more than one set, those individual envelopes were not sealed, and the individual envelopes were packed inside another package that was sealed, addressed, and stamped.
For some reason, I can't really picture why someone would order something from the Mint and not open it. I'm sure it does happen but you'd think it was a common occurrence by looking at eBay.
Have you never known anyone who's speculated and bought dozens, if not hundreds of the same mint product, just to put them away for several years?
More common now with the sealed boxes. They generally will do multiple orders so they can open something and then keep the sealed box put away hoping to sell later for a profit. Then again some others will do it just because they order from the mint out of habit and just never get around to it
I've seen pictures of sealed boxes from the mint dated in the 1960's. Point being sealed boxes are nothing new.
I see your point. When I get coins from the Mint or elsewhere, I tear into them like a kid at Christmas.
Obviously it has been around since boxes were shipped, was just saying it is a more common practice today which should draw less suspicion.
I've bought plenty of sealed boxes of multiple sets . . . usually the 5 set lottery boxes (68-S, 71-S, 75-s, 83-S). I once bought a mint-sealed box of fifty 1964 proof sets. I imagine there are bigger sealed boxes out there than that, but I don't know.
In the past decade or so, I've only sold them as purchased, instead of breaking the seals. Before that, I scored on some very nice cameos, although they were common cameo dates. I've never scored on the lotto boxes, and don't think any I've sold to others have panned out. I have a couple of 75-S boxes now, but am not tempted to open them.
I've noticed 5 seems to be the most common number lately as well. The 50 box is an impressive find. Wonder who initially ordered that one