Advice on AirPods

I’ve had the AirPods Pro 2 since April 2023. I’ve misplaced one AirPod and I’m still looking for it.

If I don’t find it, I’m debating whether to:

Replace the earbud for £65.83

Get the new APP3s for £181 (I have a discount)

My APP2s are still working great and the case is engraved so I’m not sure if it’s resale value. Any thoughts?