[Q] I got a 50$ N6 but need advise topic

Ok, So, I found this girl on my local face book and she sold me a Nexus 6 that has a shattered screen for 50$ I couldn't pass up the deal and I did contact Motorola who said that they would replace the screen for 175$ So, I am getting a great deal. The kicker is that I have no clue if it is reported stolen or what. She let me come to her house and assured me it wasn't and that she just didn't have the money to pay the 175$ for the insurance. Anyways, what do you guys think? should I send it in to Motorola? Can they keep the phone if there is something shady going on with it? It is from T Mobile from what she said. But I didn't get anything but the phone. I do have some sign of life. I just plugged it in and a green light came on up top but I have no screen action. The screen is shattered but the rest of it is in excellent condition.

As of now I have the One Plus One and I am debating on which phone is the keeper if everything does work out with it. Is there anyone else coming from the OPO who has an opinion of the 2 phones?

Any advise on my situation is highly appreciated!