It may be scrap, but it's got memories associated with it!
I can't claim anything really old, but a few examples from my hoard:
An Anderson-Jacobson AJ832 30cps daisy-wheel terminal (printer and keyboard) complete with pedestal on castors, bought by my wife in the late '70s for data-entry, retired in the late '80s and acquired in 1989 when they moved offices. Ideal for printing on fan-fold paper. Used since 1989? Never.
A K&N acoustic coupler - the sort that you put the telephone handset inside and closed the wooden lid. Maximum speed: 300bps.
Umpteen IBM token-ring ISA & MCA adaptors, a couple of hubs and a sackful of cables, all made redundant when I (reluctantly) switched to 100base-T Ethernet.
The 10" platter and heads from a DEC exchangeable disk pack of unknown age (it was scrap in 1980).
Half-a-dozen IBM PS/2 keyboards, over twenty years old but still our favourite keyboard - I'm typing on one now.
And an old favourite from the '70s and beyond: my paper-tape hand punch with integral guillotine - essential for splicing paper-tape for input to the 1904S. Ah, happy days......