What's in our Name:

collectible  or collectable
(col-lect-i-ble or col-lect-a-ble)
1. capable of being collected (adj)
2. an object suitable for a collection, originally a work of fine art or an antique, now including any items collected as a hobby, for display, or as an investment whose value may appreciate (noun)

cache (kash)
1. A store of goods or valuables that will be needed in the future and may or may not be concealed in a hiding place (noun)