I got my 330i maybe about 2 months ago. It had 29,800 miles on it. Now it has almost 34,500. That's 4,700 miles in 2 months. That times 10 months would equal about 47,000 miles after a year, or 3900 miles per month. I drive EVERYWHERE though. I have to find excuses when I don't really need to go anywhere.
Back when I had my 3000GT VR4 Spyder, I put crazy miles on that thing. I got it in late Feb. of 2002, and I got rid of it in early Dec. 2002. That is about 9 months of ownership. When I bought it, the mileage was 32,000. When I got rid of it, the mileage was 58,500. 26,500 miles in 9 months, or 3000 miles a month.
If you aren't going to get your money's worth of driving out of a car, why the hell would you buy it in the first place???? I'm not going to guy a Porsche Carrera GT and lock it in my garage so I can look at it every once in a while. That sucker would have like 100,000 miles in less than 3 years. Then I would either rebuild the engine or get a new one to slap in there, then I would drive it another 100,000 miles!
Well, if you are going to be reselling your car at all, then yeah, you should keep the mileage down. But personally, mileage to me isn't important. It's the condition of the entire vehicle. If it has high miles but looks pretty good, I'd would still take it, maybe at a -slightly- lower price. You can usually buy another engine or rebuild the old one, and have the car run like it was almost new again.