I currently have an iPhonee 6S plus (always had a case on it). Looking to get a new iPhone, but doesn't have to be the latest and greatest. I have ~$100 from trading in 2 older apple products plus my current phone to trade in. Will the apple trade in toward a "new" (whether it is the newest or not) drop in value for my current phone if I wait for the next one to come out? I don't know that I would notice a huge difference between X, XS/R, or what is rumored to be coming out. Looking for advice from people who know more than me. Thanks.