You know that when you buy used, you are inheriting someone else's problems. If you are buying a relatively new vehicle with low miles, you may not have to deal with many issues. Just remember that people sell their vehicle because of some reason. Don't be afraid to ask what that reason is, the seller will probably not tell you all the problems with the vehicle but he/she may tell you that he/she is only selling it because he/she is trying to make some money to buy some other dream car.
You might also want to consider that when you buy used, you don't receive the special finance rates as you do with a new vehicle. If you do end up buying used, it's best that you have a good amount of money to put down and a loan from your financial institution.
You don't receive a full warranty on the vehicle if you buy used. You will receive a partial warranty if one still exists for it. This means that if something goes wrong with the vehicle, you are on your own.