Hamilton tickets-need help deciding whether to buy?

I will be in NYC this summer from anywhere from 3-5 weeks. Dates are still up in the air. I see the Amex pre sale has some 179 dollar tickets available in rear mezzanine. Should I bite the bullet and purchase 2 of them. My friend in NJ thinks I will be able to resell if end up not being able to use them. But I feel that by the summer there may be more tickets available since the original cast is already gone, and the National Tour is starting. I'd love opinions!

Buy them. You will be able to sell if needed. It will still be hard to get tickets next summer.