Used Car No Nos

Here are a few things not to do when buying a used car.  I have not figured out what to do yet, but here are a few things not to do.
1.  Don't give out your credit card number, social security number, or banking account number to people on the internet.
2.  Don't pay money when the title will not be in your name.
3.  Don't wire money to someone else's bank account.
4.  Don't agree to buy the car until you know the title will be in your name.
5.  Don't buy a car on e-bay from someone in North Korea - shipping is crazy expensive!
6.  Don't buy a car that you don't want.
7.  Don't buy a car that is worse than the one you have.
8.  Don't buy a car from the Dread Pirate Roberts - he is immune to iocane powder.
9.  Don't buy a car for a lot of money when it is only a highly detailed matchbox car, even if it has a flip down dvd movie screen (7millimeter).
10.  Don't spend more that 21 hours a day researching cars.com, ebay, craigslist, usedcars.com, autotrader, kelly blue book, consumer reports, edmunds, etc.