2000 GMC Jimmy 4x4 NEED GONE

truck has 154k miles, has been sitting for a while but starts, runs, moves.... started having a missfire at lower RPM since sitting but still runs... hasnt been inspected and needs to be inspected 4.3L v6 4x4 Automatic SLT Fully loaded, power windows, seats 4 new tires (2 spare tires) 4 spare original rims new front wheel bearings new front/rear brake pads/rotors new front calipers new starter new y pipe, offroad muffler new spring shackle new fuel pump new fuel tank straps new fuel lines new brake lines new plugs/wires/cap/rotor new 4x4 vacuum parts new emissions parts new fuel tank vent valve new shift linkage she chooses not to drive it or use it and from sitting, now is mis-firing.. was running fine.... may need new shocks, its alittle boaty over bumps/hills CALL show contact info clean title pickup in west seneca ny 14224