Alright, I'm not entirely sure how NY prices compare to LA prices, but I assume they can't be too different since we are the 2 biggest cities.
Anyway, I recently purchased MUSE tickets for $50 for stadium seating. My seats aren't great and I purchased them 5 minutes or so after they were released.
Here is the deal, events like these can sell out in minutes. Reason being is that ticket scalpers will often buy up all the tickets and sell them on ebay or craigslist at outrageous prices.
I recommend doing this: Purchase as many tickets as you can. Keep the ones you need and then try to sell the others a week after it sells out on ebay/craigslist for profit. If you can not sell them, offer them up at list price to your friends.
4 days before concert, check Stubhub.com for better tickets at list price. If you can find them, post your tickets on craigslist for list price.
KROQs almost acoustic christmas 2 years ago was $45. Muse, Jimmy Eat World, Modest Mouse, the Shins, and the Killers were playing. I tried to get tickets but it sold out too fast. They were going for $150 on ebay.
2 days before the show I checked stubhub and found tickets for $11 a piece cause so many scalpers were selling them too high that they couldnt sell them at all and became desperate.