i'd probably guess less than 200lbs for sure. exactly what they weigh i'm not sure, i suck at judging weight by feel.
bumpers might be 20-30lbs each
door skins like 5-10lbs
fenders like 5lbs
rear lower 1/4 panels like 5lbs
rear clip probably around the 40-50lbs mark
front roof section 5-10lbs
the hood and decklid are definately heavier, not sure if those are included in your question, i could see them being 70-80 lbs a piece.
hope that helps, all this is just from feeling them and carrying them and memory, so it probably not that accurate