Most GPS systems allow you to update your system periodically so they can provide you with current information. When you buy a cheap GPS system, you are more likely compromising signal quality rather than current information
The cheapest GPS systems are good for casual use. These are not always the most reliable and up to date systems, and can have software incompatibility issues.
There are many different GPS car navigation systems on the market and some can be purchased for reasonably low prices. Research has shown that the cheapest GPS currently on the market is the TomTom ONE 130S.
Any of the Navigator GPS systems are great systems. You can buy them almost anywhere but one of the cheapest places that I know of online is Amazon and offline is Wal-Mart.
The cheapest GPS can be found at Wal-Mart or zellers. The closest retailer would have to the shopping center 2.5km south from here on route 400, just on the left past Stubo's.
If you are planning a family vacation and need a GPS to guide you on your way, then I would suggest the brand TOMTOM since it provides cheap and effective GPS systems.
On Google shopping, we found the cheapest GPS units are $50. It is the Magellan RoadMate 1424 and can be found for that price at Pricefalls.com.
www.amazon.com has the widest selection of GPS navigation systems. They have all brands so you can find the cheapest ones at a great price. These include the basic systems that simply get you from point "A" to point "B" and the more advanced systems that include traffic rerouting, weather, and voice control.
The cheapest Garmin GPS is the Nuvi 205 3.5" Portable GPS. It is available at Walmart: http://www.walmart.com/ip/Garmin-nuvi-205-3.5-Portable-GPS-Black/13020913.
to find the answer to your question: How are TomTom Rider GPS systems different from regular GPS systems? please see the following website to learn more: www.tomtom.com/
Alpine Electronics of America Systems make the GPS systems for Chrysler.
There are good and inexpensive GPS systems for trucks. These GPS systems for trucks include Garmin Nuvi 465t 4.3" GPS Truck Navigator and IntelliRoute TND Truck GPS.
You can find the difference between marine gps systems and garmin gps systems on the following site: http://www.secrets2business.com/the-difference-between-marine-gps-handhelds-and-their-bigger-brothers/. They have good descriptions.