Yup, the LST platform is my all time favorite. Theyre not really rare. You can find them quite often on ebay although typically stock which this one does have some after market hop ups on it. Theyre not really expensive, or at least not any more expensive than any other 15 year old 1/8 scale...
One of the versions of the truck you have was gas kit. I need an exact measurement from the center of the front wheel hex to the center of the rear wheel hex in order to tell you the exact model.