Any good Nissan Sentra is a good choice. They are plentiful used depending on where you live. I suggest you do some internet shopping. If you see any car advertised at one price, make sure they sell it to you for that price. I assure you that if don't know what a car should sell for & just blindly walk into a dealership, they have the advantage there. They are out to make a profit & business is business. But you need to take a hard look at what you need vs. what you want. the advice for buying a used car is endless, so in the end it really is your responsibility to make sure you don't get screwed. Any used car should be inspected. Plenty of crap out there. Also, many used cars are sold as is. Be sure you know their return policies if you get a lemon. Anything not in writing doesn't exist as far as the contracts go.