I might be guilty of recommending these gloves . I have been driving my Westfield in a pair of these every winter for the last 7 or so years and they are a game changer. When you have to psych up for the cold hands on the steering wheel and then you think oh I will just put the electric gloves on, it's great, you arrive at your destination comfortable.
I only ever use them on setting number 1, more than that and it's too warm, although it's nice to put them on number 3 before you go out for a toastie start.
I have female sized hands though, so they fit me perfectly and I can just pop them on and off easily, I recommend you try them on.
They are also useful to wear for any outdoor hobbies, not just driving. Good luck with the sale, Dave, and if anyone has any questions or is near the Peak District, I will be wearing mine on Sunday, you are welcome to come and have a look at them.