Omnitech 4.3″ Portable GPS Navigator for $39.99. Here is a screenshot for your reference. Add this filler for $6.49 to pad the order for free shipping, making the total $46.48 shipped. This GPS features a 4.3″ touchscreen LCD, text to speech with street names, preloaded maps of 48 US states, and SD/MMC memory card slot. It usually goes for over $75.