Rand Mcnally NTD 740

I have the Rand McNally NTD 740 with the ELD 50. It is about 2 years old I think but it works fine other then sometimes the navigation would mess up and you have to go to the GPS repair on the unit and it would put it back in order. New the ELD 50 sales for about $150.00 or maybe less if you shop around and the 740 is about $400.00 new. I have it priced for all at $200.00.