deadstock

Merchandise that has not yielded any use yet: from the view of the businessperson, one that has failed to be sold or processed and is now stowed away for possible sale or manufacturing at a later date, from the view of the consumer, a piece

No newsboy could possibly have got half way to Fairfax with any copies of the TIMES "unsold:" -- he wouldn't have had one left by the time he had crossed the Potomac, but would have fallen back on his dead stock of Tribunes and Heralds.

the small space is a goldmine of never-been-worn big-name deadstock, including threads by Miu Miu, Alberta Ferretti and Stella McCartney,[…]

Agricultural implements and stored produce, distinguished from livestock.

[…]examining in turn, the husbandry of livestock, the consumption of domestic deadstock, and hunting in the earlier Neolithic,[…]

Poultry housing is the 'dead stock' of a poultry unit and as such represents a considerable portion of the capital outlay,[…]

To store in appropriate packaging for later.