Will be interesting to see how these age in a number of years, given the entire checklist are essentially rookie cards for most of the players who haven't played NBA or been top college prospects.
Unlucky (or lucky for collectors maybe depending on your view) that these were released a few years after the Ball/Giddey rookie seasons. Those rookie auto's and 1/1, /5 etc would have been extremely big cards, even internationally imo.
So it's going to see how these go moving forward, especially with the likelihood of some NBA draft prospects who skip college via the NBL and top Aussie prospects like Giddey having their true rookie cards in these NBL sets.
There's a possibility some of Ball's most expensive cards would have been in those NBL sets with the lower print runs.
More exposure to the NBL by American collectors is only a good thing.
I think you will find these top cards will even outstrip AFL/NRL values in the future given the overseas market for the right player.