I worked for a boat dealer and one of our customers owned a small printing company, so he was basically the owner, salesman, maintenance guy, etc. He came in on a Saturday wearing bib overalls with the herringbone pattern, like an old-time train engineer and they had smudges of ink everywhere. His hands had dried ink on them and he even had some on his face. We didn't care, but someone made a comment and he told us about going to a car dealer that was between his business and home on another day when he had done some maintenance- he went in but nobody would talk to him until he made the first move and approached someone, who basically made him feel like a leper. Didn't get many of the answers he needed, so he left. On the way home, he made a short detour to another dealer for the same brand of car went there to see what they had. Same day, no difference in the way he looked and they treated him as they would if he were wearing a nice suit. After he got the info he needed, he said "OK, I'll take one in red and another in dark blue". He had been looking at the BMW 6-series cars and he bought the other for his wife.
Yeah, he went back to the first dealership in his new car, dressed the same way after doing maintenance and smiled as he drove past the salesman who wouldn't help him.
He shouldn't have needed to tell the guy he was thinking about buying two cars, the guy should have just done his job.