For context, asteroids were hundreds of thousands of miles apart, and that was a conservative estimate. Yet, the twins obviously didn't use any teleportation arrays, but were back within a few hours. Of course, Dyon was shocked.
According to the information the twins brought back, Soul Market was meticulously organized. Of the 22 bases, there were three main divisions decided by both age and value of the soul slaves soul.
4 bases were strictly filled with those younger than the age of 12. They were training facilities, because normally, this age was far too early to sell of a soul.
After this, there was a separation of talent.