I was originally leasing my Maxima, it's not that hard to keep your car clean. I had the option of trading it in or buying it out - I liked it, wanted to keep it some more and bought it out. It's stupid to pay nearly twice for a finance + bank fees, when you can pay far less if you lease and keep your car clean.
Plus you get a far better car than you could have bought.
I used to have a negative attitude about leasing, but I think it is the shit now.
The bad about leasing:
You have to treat your car well.
You have a mileage limit.
You don't own it.
Good:
You only pay for what you use.
You don't get screwed on depriciation.
Maitenance is cheaper on a younger car.
You can get a better car.
If you treat your stuff like shit, why buy it? That to me is a crap argument. Anything worth putting cash into is worth taking care of, moreso if you're keeping it.
Mileage limits are pretty good, plus you can get larger mileage leases if necessary. A typical lease gets you 12-15k a year, which is plenty.
The ownership issue is fairly moot as well. A lease isn't a rip beacuse you don't keep it. You're not paying for the car, you pay for the use of it. When you have "used up" a lease car, you get a brand new one and do the same. With a purchase you have to keep the car you have used. That is not necessarily a bad thing, but it will run you more in maitenance.
In my case, I was able to get a far better car, treated it great, and eventually bought it. And I will end up paying far less with a lease purchase than I did with a straight buy, and I was able to spread that price over a larger time. Had I bought my car I would have paid 400 or so a month. I leased for 5 yrs and bought which will take an additional 2 yrs. My lease+ buy cost me an average of just under 240 a month. I saved about 7g. And you should also factor that I was able to spread that smaller payment over a far larger time period, whereas with the purchase I would have had to pay far more in a more compressed period, and get screwed with depriciation.
Never put money down. It does you no good. The money can be put in a place to earn you more than your interest rate oon your car. It probably won't reduce your overall price all that much. I have friends who sell cars. They never buy, and never put money down.