I'm told there are plans to add a trade-in button to the product detail page, but they were delayed first by a technical problem and then because of the holiday

I'm told there are plans to add a trade-in button to the product detail page, but they were delayed first by a technical problem and then because of the holidays. (Amazon will not launch unproven changes during the critical holiday shopping season.) The change will go through A/B testing before general launch, of course.