If they add a 2nd NYC show, I bet you'll be able to get tickets for the first show from the brokers really, really cheap a few days before. This is exactly what happened recently when Interpol played a couple of nights here in DC and then a third show just an hour away in Baltimore. The DC shows sold out before the events were even widely announced (and boy was I pissed!). Ticket brokers grabbed many of these tickets, yet a few days before the show they were letting the tickets go for as little as $20, well below face value. All those people trying to make a profit on Ebay may get pretty desperate too.
Here's a broker who has tons of tickets for the NYC show, all priced at over $100. If New Order adds a 2nd show, check back here around May 1st and see what the prices look like then. I hope New Order adds a second show just to screw over these guys!
http://www.ticketsmyway.com/