Refurbished smart watch

[Barnowls]

Hi all
I'd like to get 17 year old Dd a smartwatch for Christmas...
Will £100ish get me a decent refurbished one?
She has a Google Pixel phone.
I've looked on Back Market etc but I'm slightly confused about the whole concept of smart watches, let alone which model is any good 😳
Any advice gratefully received 😊

Bump ....

Id look for a pixel watch to go with the phone...

Three had the pixel watch 1 for £100 this week, brand new, although slightly dated.