She bought it through the so-called Honest Used Car Dealers Association.
Advanced English Dictionary
+adjective 1[only before noun] used to show that you do not think that the word or phrase that is being used to describe sb/sth is appropriate: the opinion of a so-called 'expert' + How have these so-called improvements helped the local community? 2[usually before noun] used to introduce the word that people usually use to describe sth: artists from the so-called 'School of London'
Random quote: You are important enough to ask and you are blessed enough to receive back.: Wayne Dyer