This TomTom GO 50S GPS Navigation System with Lifetime Maps and Traffic with Accessory Kit originally $129.99 drops to $97.99 at Overstock. You save 25% off the retail price for this GPS navigation system. Plus, this item ships free. This is the lowest price online by about $13; however, you can find refurbished items for as low as $71.95 on eBay.com. The TomTom GO 50S features a 5-inch touch screen, integrated mount, lifetime North America map updates, USB cable and car charger. Sales tax is charged in most states.