Congratulations! You've made the brilliant decision to think about buying a used car. I say "congratulations" because your success is assured; you just need to choose among used cars to find the right one, and believe me, the right one is out there waiting just for you. For every driver, there is a used car that fits their budget, lifestyle, driving needs and style. Everyone thinks they are looking for just that one particular car, but as a dealer I've seen many people choose something they didn't expect because they thought about what it is they needed.
Be honest with yourself and you will find used cars that you will genuinely be happy with. Do you like style? Do you like to be with the "in" crowd and have a cool, flashy car you can show off? Some people might or might not like to admit it to themselves if the answer is "yes" but it might be. In that case, it is worth paying up for a flashy car if that will make you happy. You may not be satisfied until you do.
On the other hand simple used cars might be suitable if you want something basic that will do the job of driving, may not be that fancy, but will get you and your family where they need to go. You don't need to pay a lot of money to find a serviceable used car that drives well and can carry a large family. In other words, think carefully about what your life is like when selecting a car, and you are that much more likely to be happy with your purchase.
Used cars are like people and selling them is like introducing people. Customers are happy with their purchases if they put a lot of thought into making them, and as a dealer, it is good to be a part of that.