That's a good question, and I have no idea. I know that the current D League salary is 25K for the best players with a per diem for meals, etc, which the NBA ought to be ashamed of.
I'm not sure what the typical player makes overseas, but I would guess that it starts right around $100,000 and goes up from there. I read Paul Shirley's book a long while back and I vaguely recall him claiming contract amounts substantially more than $100K overseas, but who knows whether that was embellished or if he ever actually got paid out for the full amount of the contract. Some of the European leagues are a little sketchy.
@brentblum , do you know much about how competitive the overseas leagues are in comparison with the D League or NBA?