Well, like a lot of old things that are still very common, they remain common for a while . . . until one day they're not.
Colt Firearms made almost three-quarters of a million Colt Navy .36 caliber revolvers between 1851 and 1873. Each of them came in a really nice felt lined cedar box, with separate compartments for the can of caps, the lead balls, and the ball mold.
All of these were as common as dirt up into the late 1930s. Back then, as a toy, grandpa would give his old Navy to his grandson, who could then just put the percussion caps on the cylinder nipples and use it as a "cap gun." The boxes were probably given to granddaughters as a faux jewelry box.
Today, Colt 51 Navies in "Fine" condition can go for around $2,500 to $3,000. (That means it still has all original parts but only 30% of its original finish. Not exactly a great looking piece.)
The original felt lined boxes, if you can ever find one, can go for $2,000 to $4,000 in nice shape.
So, that's why I feel really bad about burning out the classic, time honored, reliable, train items, even if for today they are still common. I feel pretty certain that in 50 to 75 years, the 1950s 022 Switches will be gone, or primarily seen in layouts in train museums.
Mannyrock