Adam Clarke on Genesis 23:10

And Ephron dwelt among the children of Heth - And Ephron ישב yosheb, was sitting among the children of Heth, but, as was before conjectured, was personally unknown to Abraham; he therefore answered for himself, making a free tender of the field, etc., to Abraham, in the presence of all the people, which amounted to a legal conveyance of the whole property to the patriarch.