The Nest Hub Max is down to £189 from all/most retailers. Direct with Google, AO, John Lewis, Currys (to name a few). The new Nest Hub might mean there is a new Nest Hub Max is also in the pipeline.
Topcashback currently has 15% cashback on "specific Nest products" at Currys, and the Hub Max is definitely on that list. Will usually track at a lower level and then uplift after 2 weeks or so. Also note with Currys the 15% applies to the pre VAT price. So this would be £23.60 cash back.
Note TCB is not guaranteed and you need to be careful and ideally clear cookies before going through. If it all comes off this would be the Hub Max for £165.40