Don't know about scopes, but a few years ago I won a NIB Tektronix plugin, a 3T2.
http://w140.com/tekwiki/wiki/3T2It was in its original packaging: a cardboard box taped up with water-activated paper adhesive tape, that brown stuff. It has a nice old-school Tektronix logo on it. But inside was a nasty surprise, I guess before styrofoam inserts became a "thing", they used a horrible material called rubberized horsehair.
https://www.upholsteryconnection.com/products/rubberhair-rubberized-curled-hairSo they made end caps out of this stuff to hold the plugin in place. Wonderful except that it decays and gets very moldy. I opened the box and was almost knocked to the ground by the smell. Imagine a damp moldy musty basement with no dehumidifier left alone for 40 years, multiplied by a thousand, and concentrated into a square foot.
And of course, it damaged everything it touched, the rear connector's gold-plated pins were black, the front panel was filthy. I'm usually a hoarder and keep everything but the rubberized end caps went into the bin, goodbye!
Luckily the box quickly lost the odor and the plugin was easily cleaned up.