"And my dick fucks your wife more than you do. What's your point?"

Serious answer:

That's cool. What makes it special?

Sometimes people talk about how expensive something they own is simply because they're proud that they could afford it and even when they're being tone-deaf, there's no benefit to getting offended when you could just move the conversation along instead. (Although you might have to listen to them talk about watches.) If they were trying to brag, now they're stuck trying to explain why the watch is actually worth what they paid and you're the one judging them.

Cars (and watches) aren't so expensive that a middle-class person can't plausibly already own the one he would buy even if money was unlimited. You can act like that's true about you. My status-conscious former mother in law was bothered by the fact that I owned an old car, but when she would bring it up I would just say "I really like the 2008 model." She couldn't argue with that.