Only able to vendor items in main bag.
It’s because it is a Safe box.
“Items in this box will never appear in a sell-to-vendor list and will not move when inventory is sorted. "
mouse over the bag’s tooltip
“Items in this box will never appear in a sell-to-vendor list and will not move when inventory is sorted.”
you gotta read tooltips. you can’t be a decent player until you learn to read what is given to you via tooltips.
As this issue is resolved, this thread is closed.