I would say based on listings on kijiji, craigslist, and eBay that rear projection tv's vary in price anywhere from $50 to $300. The price ranges on the condition of the tv, if it works, the size and the resolution/quality.
Furniture pads and properly secure the TV in the truck by using the tie down rails. If you're just moving it from one side of the room to another, furniture moving pads are probably the best.