Contacting owner of iPhone in Activation Lock

One year ago, I bought an iPhone 7 Plus through OfferUp, and I erased the contents on the phone and it became stuck in activation lock. I tried everything I can possibly think of during that time to bypass the lock. I’ve had revisited the phone again and as my last effort, I was wondering if there’s anyway to get the blanked out Apple ID that my phone is locked under. I want to use this email to contact the person, who is my only chance of unlocking the phone. I understand this could be a violation of privacy, but if I can just get the email of the Apple ID, there is a chance of that my $700 did not go to waste.