I'm not sure about street price. For whatever reason, after releasing a ton of great seats for today's game, they haven't released any for the Friday and Saturday games. I'm hoping that changes, though. Kids 2 and under don't need a ticket, so unless you think she can pass for 1 or 2, she will need one. SRO tickets are sold when the box office opens the morning of the game. I don't know how you could manage that with a 4-year-old, though. By the way, it's obviously too late now, but they even released dugout and bullpen seats this morning for today's game. I'm guessing they released a lot of tickets for today's game because it was a makeup game. But yeah, the street value has been low all year. I've been able to consistantly get tickets below face value if you are willing to wait until game time. My friend was even able to get $32 seats for the first Red Sox-Cubs game for $40 by waiting until the game started. I would expect to pay face value or slightly more considering its a Saturday in July and the Cubs have been playing better recently.