I have run into this problem before as well. Not because of race but because of my work. I 'm in landscaping and am usually a filthy mess. I walked into a dealership to look at a truck and they looked at me like I was an alien. Because my clothes were all dirty they assumed I didnt' have any money. Little did they know i had already been approved and had the letter in my pocket. After about 10 min. of their crap I asked them is there a problem? One guy said to me well sir I'm just wondering if you might be interested in some used trucks we have out back. I looked at him , pulled out the letter and said you just lost a 35k sale you a s s ho le and went to another dealership. You should have seen the guy trying to back peddle as i was walking out the door.