I'm neither the builder nor the customer in this scenario. I know the builder.
He told me he never drives one of his branded vans when he goes to give a quote. Instead, he takes his car. A luxury model with a personalised plate. I don't know shit about cars but a quick google tells me in the region of a £75k car.
He said the reason he doesn't take the van is that competitors could see he was at a property and go in after he leaves to undercut him and poach his business
Obviously he uses the vans if he actually gets the job.
He'd never listen to me and he'll never know about this thread. But would a builder turning up in a swanky car put you off? I just think my first impression would be he's a bit of a flash twat, and probably charges too much 
AIBU?