That's actually hilarious! Did you reply back in kind? I would have absolutely done so and depending on the salesperson's reaction, we would either get along really well or the manager would get involved..

It must be a car dealership thing - the only time i had a bad experience based on being sized up was at a car dealer too. I had just quit my job and wanted to buy a SUV to replace my sports convertible. So i roll into a dealership in my late 20s, wearing cargo shorts, flip flops and a t-shirt. Hardly got the time of the day and barely got some literature and a business card. Went to another dealer, bought the car and then wrote to the other dealer with a photo of the car and the name of the salesperson who was not helpful. That got a very apologetic phone call from the manager. Petty and vindictive, yeah - but very satisfying.

OTOH, with watches, I have never had a negative experience. I have walked into a Patek boutique while wearing shorts/t-shirts/sneakers and not even a fancy watch (was on a stopover in Singapore on the way back from a diving holiday - those were the only clothes I had), and they were happy to pull out whatever i wanted to see, including opening up a sealed box of a new model they had just received. Go figure.