Gaze's last NBL season was 2004-05, so he ended his NBL career a few months before his 40th birthday (July 2005).
Bradtke was under 40 (37) when he retired from NBL, as was Grace (38)
Mark Davis turned 40 during his last season
Closer to 40 than 35 when they retired from teh NBL would bring in a bunch of players, like Pinder, Willie Simmons? How old was Bruce Bolden in his last game? I really wonder how old was Jerry Dennard in his last season?
This made me wonder about players who played their first NBL game after they were 30? Rimas Kurtinaitis comes to mind but there must have been a few more in the early days of the NBL. Kurtinaitis was 33 when he played his season with the Suns and he played another 9 years professionally after that (outside of Australia).