1979 INVADER INVADER 21, INVADER 21 - OPTIONS: 3 YR OLD TOILET, 3 YR OLD TIRES W/BUDDY BEARINGS, 2-30 LB LPG TANKS, FIRE EXTINGUISHER, TRAILER HITCH, SPARE TIRE & CARRIER, LPG GAS/SMOKE DETECTOR, AUXILIARY BATTERY, 4-BURNER RANGE, SCISSOR STABILIZER JACKS, POP UP TV ANTENNA, 6GAL GAS WATER HEATER,...