What questions should I ask when looking for a used throttle body?

What is your question?

My car has had loss of power. Biggest issue> My hazard light comes on spontaneously & locks breaks. I pull car over. It shakes back & forth and I'm unable to drive, as if the breaks have locked on me. So, I turn car off and then back on and problem goes away for the day, but never fails to happen the next day or two. Its been occurring more lately. I took it to a mechanic & they said it was defiantly the throttle body.