To make an individual purchase, a character must roll under their reputation score with the following modifiers. A successful roll means the character has acquired one of the item.
The location where the gear is being purchased will also modify the roll. The GM will apply a modifier based on the location. Guns are ubiquitous on a hive world but not so easy to come by on a death world. Having a Peer related to what is being purchased can also help.
For the Kill team to make a large purchase, such as buying a tank, repair their ship, or hire more crew, use the Kill teams score rather than an individual character's score.The GM will determine if any additional modifiers are needed. If the roll is successful then the Kill Team has made the purchase. In the case of gear, they purchase enough to outfit the entire crew.