Timing belts on the newer GS are 90 thou or 7 years whichever comes first, the older GS are 60 thou or 7 years whichever comes first. We need to know exactly what is being done to know if the price is too high. Around the 90 thou or 7 year mark here's what should be done or have been done in the past, timing belt, tensioner, water pump, thermostat, new fluids(tranny, brakes, power steering, differential) possibly new hoses, drive belt, plugs, (fuel filter, plug wires, cap, rotor if it applies), engine flush before switch to synthetic, engine and trans mounts inspected, vacuum hoses inspected, radiator flushed. Steering and suspension inspected <_<