What To Look For
Your auto global positioning system (GPS) receiver should have the ability to add and update maps. Ideally the device should be able to receive wireless updates, which download directly and automatically from the manufacturer; however, a USB or memory card slot to add your own updates will suffice. Maps can change frequently in developing areas, and you don't want to be stuck with outdated ones.
Common Pitfalls
It is important to get the appropriate screen size. A smaller screen size may save you money, but if you can't glance at it easily, then it won't do you much good. Common screen sizes are 3.5 inches, 4.3 inches and 5 inches. If you are farsighted, then it may be worth the extra money to buy a 5-inch screen, especially if you need to see the route rather than having the instructions read to you.
Where To Buy
Auto GPS receivers can be found in nearly every general merchandise store, but the selection may be limited in your area. A better option is to check the website of a store such as K-Mart or Target to get the best selection and shop for the best prices. You will be able to see all of the GPS receivers available, read about their features and compare prices side-by-side.
Cost
There is an auto GPS for nearly every budget. As of 2010, prices range from $100 for budget GPS receivers like the TomTom One 125 to $500 for luxury GPS receivers like the Garmin nuvi 1690. The most expensive receivers come with all of the bells and whistles, such as widescreen ultra-slim touchscreen displays, Bluetooth technology and multiple destination sorters. The cheaper models include the basics: U.S. street maps and the ability to tell you which way to go.
Accessories
You will need updated maps for your auto GPS receiver, which may be free or which may cost you extra. The more you paid for your auto GPS receiver, the more likely you will be to receive free map updates from your receiver's manufacturer.
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