deadstock

Short definition from Wiktionary

Noun

1. 1
   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 that has been obtained but not found application and is now—perhaps even with original labelling or packaging—stored for future ideas.
2. 2
   Agricultural implements and stored produce, distinguished from livestock.

Verb

1. 1
   To store in appropriate packaging for later.