I think the bigger question is - how much do you trust the person willing to sell you the ticket.
Stubhub has a special verification process for Cursed Child, I believe (chorus, correct me if I'm wrong).
A random person from a group could or could not be legit.
Accessibly priced tickets can be available but actually do take a lot of time and persistence to secure.
$200 for two Broadway show seats in the orchestra is a reasonable price. Perspective here- depending on the show it would be a deal for a SINGLE ticket.
If you have a limited schedule and you MUST see the show on your trip, you really should buy ahead because nothing is guaranteed. Your trip date is after the Tonys which COULD affect availability and pricing.
But at this point your biggest concern should be- how much do you trust the seller.
So, that was the Drowsy Chaperone. Oh, I love it so much. I know it's not a perfect show...but it does what a musical is supposed to do. It takes you to another world, and it gives you a little tune to carry with you in your head for when you're feeling blue. Ya know?