Just the Thing
As a standard action, you can reach into your backpack, pocket, or other suitable storage space, and spend Resolve Points to acquire an item you can afford but don’t own. The item must have a bulk of 1 or less, and an item level no greater than your level – 1. You immediately lose a number of credits equal to the value of the item, as this ability assumes you prepurchased or traded for this item at some point in the past. If the item you pull out is a consumable item (such as a grenade, serum, or spell gem), you must spend 1 Resolve Point. Otherwise, you must spend a number of Resolve Points equal to half the item level.
Source
Starfinder Enhanced pg. 187