Legit Airpod Trade?? (New AP4 for used or new authentic APP3s)

I'm eligible for a pair of new Airpod 4s through a bank promotion, but am really hoping to get a pair of Airpod Pro 3s for the hearing aid function (so they need to be legitimate). Anyone who shelled out for the Pros (3 as they have higher frequency capacity) realise they prefer the non-pro and wanna trade down for the "newness" factor? Mine will be brand new in box, and I'd be more than happy to meet at any Apple store to verify authenticity (of both) for both our safety, and happy to their in something else of mine to make up for the difference in value! Also happy to straight up trade other items I have for your airpod pro 3s if you don't want my BNIB 4s