The most I can remember paying is about $200/ticket for baseball.
Paid about that for 4 Bosox tix as a present for my daughter's last birthday, of course all of her closest friends ended up being busy but she found 2 good friends to join us (wife wasn't interested). It was a nice setup, we were on the same level as the luxury boxes but not as close to home plate and had special access to a nice restaurant/bar. The seats are far less cramped than in the lower parts of the park and I think the were even padded. Ended up having two rain delays and the temp dropped a LOT during the game, my daughter and I had left our coats in the car because it was sort of sweltering when we got there and I ended up dropping close to $100 on a hoodie to keep her warm (her friends were smarter and wore their hoodies). Left close to midnight and I think the game was only in the 6th, the kids had seen enough and I had work the next day.
Counting food for the gang and parking (reserved a spot in a nearby lot with ParkWhiz), I must have dropped about $1k overall. It was a fun night, even with the rain, and one of the kids sent a nice thank you card saying it was her first trip to Fenway and she loved the whole experience.
Must have paid a similar amount per ticket last time we went to Wrigley, pretty sure we got first row upper deck box seats and the view was fantastic...took the wife, daughter, and sister. Had to go StubHub for that one, which kicked the price up.
We always do the discount day of tickets when we go to Broadway and haven't been disappointed yet! I really don't care exactly which show we see, they're all good.