Purchasing Cargo Shuttle (White Giant)

When i try to place an order for a cargo shuttle it won't let me and i don't know why, i have a space center and enough money to place an order.

Cargo shuttles are not available on world markets if that is where you are trying to buy one.

To buy a shuttle, go to the portal page then click on direct trading on the left hand side, then click on 'buy or sell cargo shuttles' which will show any available shuttles to buy. These are purchased using gold coins. When you have bought it your shuttle will instantly appear on the galaxy page and you can then fly it to your space centre.