The letters LTD is an abbreviation for LIMITED. I checked with a Forest River Dealer on the Sunseeker in question and they said sometimes the unit could have extra equipment in it as a special offer for a limit time, or they could use the abbreviation LTD to identifiy a certain models. Forest River as an examble has two different pop up models that are close together, one is 1940 model and the other one is the 1960 LTD model. The salesman said there is nothing special about them just that the 1960 is an LTD. One would think that the LTD would be around for a short time, but that's not always the case, sometimes they could be in production for years. I hope this helps. If anyone finds out something different please post.