I disagree. This car is a good fundraiser because it appeals to a lot of different people. Most people I know would put a for sale sign on it so soon as they won. And then buy a van or help pay off their house, etc. Younger or older people without kids might keep it. How many carseats can you get in this car?
It's a luxury car. For those with means and who desire luxury goods. For those who want to appear better than their peers -- to show they have "arrived".
There are several things you are overlooking:
1. A luxury car is a luxury car. If you "keep it", you're still deciding to spend $30,000 on your "basic transportation". You could sell it and buy TWO like-new 4-door sedans "for the common man".
2. Thieves will be more likely to look in that car for money/gold/jewels/valuables/electronics, since you are obviously rich (as they see it). Oh, and a car like this is worth the risk and trouble of stealing the car itself!
3. Even if you don't intend it, everyone will believe you bought the car on purpose (which you did -- you didn't sell it, after all!) and will get the impression you consider yourself wealthier/more successful/better than they.
4. Insurance premiums will likely be higher.
5. Repairs and routine maintenance will *certainly* be higher. I believe an oil change will set you back $300 - $400. A former member of CathInfo suggested you proposition a mechanic at a Mercedes-Benz dealership to do "moonlighting" or side work for less. Basically, find a young man willing to do the same work off-hours in his own garage for a fraction of the cost. But who has the time and ability to arrange something like that? Maybe if you're Mr. Salesman, with a well-worn copy of "How to make friends and influence people" under your arm. But what about the rest of us? $300 oil changes it is. NOTE: Everyone can't simply stroll into a Mercedes-Benz and wait in line to chat with one of the mechanics privately. If it were that easy, NO ONE would pay the $300 for oil changes! Think about it.
So considering #5 alone, the choice of "what the heck. I'll just keep it" means you spend THREE HUNDRED DOLLARS (or more) every oil change, instead of the usual $35 or $40. That's quite a luxury expense right there. Paying $260 more just for an oil change!