I’m heading to the US next month and I normally buy my Apple gear there from Best Buy when it’s on sale, although the current exchange rate is pretty poor. I checked out the new Airpods Pro and when you factor in sales tax they are only around £8 cheaper in the US, which isn’t worth it especially given the better consumer protection when you buy (and live) in the UK.
That said, I did order a Macbook Air from BB yesterday in the sale, to be delivered to the friends we are visiting next month - can’t wait!