Some of the advice I've heard is to set your prices similar to a team that would go 22-0 for the first 2 updates. I tend to set my prices 25%-33% above what I consider "normal" during a promotion bonus time-frame.
edit: Based on some experience, I would recommend:
bleachers 13000 - $16 (will need to lower this at the next update to ~$15, then down to about $12 for the final update, depending on your performance)
lower tier 4805 - $33? (I only had 3000 seats when I promoted, so this probably isn't accurate; I was close to selling out at $35)
court side 500 - $110
luxury boxes 43 - $550
These are based on my promotion numbers from a few seasons ago, so they might need some tweeking. These should get you into the right ballpark though.
Last edited by tictacshack at 7/6/2014 1:19:03 PM