Cargo Containers for more profit. Cargo Container - Iridium Cargo Containers are used to ship goods from one place to another. You can make huge profits if you trade with these containers. All you need is a train which can carry these Cargo Pods. Class 10 Cost: $200,000 Top Sell Price: $1,000,000 Cargo space usage: 400 units Where to purchase: Every main NPCs faction planet (like Planet Manhattan or Planet New London) in Sirius and Sol.