Oxidation

[Brian Knittel]

> Roger Holmes wrote:
>
> A couple of [keypunch drums] have come up on eBay in the last five
> years and both went for silly money which to me means there are
> more keypunches than drums.   

That's one interpretation, but it just considers the scarceness factor. 
You also have to figure in the saneness factor. If you want a punched 
card era memorabilis, a drum is a heck of a lot easier to ship, store 
and display than a whole keypunch machine.