Beware of the prolieration of Counterfeit Tubes?

The old rules should still apply.
If something seems like too good a deal, you should instinctively know better.
There are currently more "gold pin tubes" offered on Ebay, which could possibly exist.
The 6DJ8 / ECC88 / Cca /6922 type of tubes, is the most abused.
NOS tubes are not supposed to have perfect print.
Latest trick and tip-off: The print is "imperfect" in the exact same place.
Stupidest criminal act: Printing "Bugle Boy" on the tube or tube box, it was always, just a nick-name!
Original boxes are your best friend, but boxes can be copied.
What is your experience with this issue?