HELP! Rehoming "Jade"

Not sure if this is really an appropriate post, but my wife, Anita and I, moved from Nevada, Texas in 2007 to open a Rock and Mineral Shop in Mount Ida, AR, the Quartz Crystal Capital of the World. Our dog, Jade, has become too possessive and protective of us and gets very anxious with other people. She has never hurt anyone, but we are getting too "mature" to effectively handle her, so we need to find her another home. She warms up to new people after about a week of exposure to them and then becomes a 80 pound lap dog with them. She just needs an owner that is firm and loving. We will deliver her anywhere in Texas. She is 4 years old, is spayed and has all her shots. Never been sick. Responds well to "Sit, Stay, Down, Come commands and is house broken. Please help. if you can.