B6 would cost more then 50k though..
You can find for cheaper than that. Next Wednesday, for example:

Pretty bad value at 1.3CPP, though.
Alternatively, you can buy JetBlue travel bank for 85% (about $550), and earn full points on the flight.
50k AA is worth $600 minimum. Idk if that's such great value. You can do better with 50k AA.