The thing to understand about watches that cost more than most cars, is someone buying one already has a handful of cars worth more than the watch. They don't work paycheck to paycheck, by the time they wake up in the morning they have made more than most people do in their lifetimes.
The poster in post #10 referenced the brand Patek Phillipe, that's chump change compared to other watched they sell, such as this one that's almost $1 million: LINK
Same idea goes for the Bugatti Veyron, who would throw down over a million dollars on a car? There was some sort of study done on the average Veyron owner, which had: 4 mansions, 2 private jets, 12 high end cars, and 1 yacht. **Don't quote me on the exact figures, it was something around those lines.
It's all relative....
EDIT: my figure on the average Veyron owner is kind of off...
The average Veyron owner has 3 jets, 1 yacht, and 84 cars: LINK
That's kind of stupid... why would anyone want 84 cars...
If I had 84 cars, I would throw away at least 74 of them...