I like DeerTick's idea of two a week with one pre-war and one post-war. Maybe have a min value of ~$1k for pre-war and ~$250 for postwar. Five days, and as someone said above, 24 (or XX) hours after the last bid, minimizing sniping and 3:00 AM end times.
Finally, if a card does not sell, the member auctioning the card doesn't get another turn on the front page for six months. Tired of seeing the same cards on BST listed and bumped for months waiting for someone with cash to burn.
And one last thing I need some help with. Strictly speaking, pre-war should be before WWII started (you can't be pre-war if the war is raging) and post-war should be after it ended. So what are the in-between years??