Bent = damaged.= $0 credit on the trade-in. Also the iPhone 6 wasn't one of the 13 eligible trade-in devices to get you the full credit for a "free" iPhone 7.
I'm most definitely NOT a VZW employee. If a post answered your question, please mark it as the answer.
It won't be accepted. My 17 year old son kept his in the backpocket of his jeans and it slightly bent it. It was fine otherwise, so I thought they'd accept it, but they wouldn't.