I found a near perfect black interior in a '77 320i yesterday. Front and rear side panels are in excellent condition and the rear seat is near perfect also. Even the top of the back seat. The seat is also very soft, like the "leatherette" stuff. No tears or problems of any kind and far as I could tell. Anyway, I don't own a 3-series so its of no use to me, but I'd be willing to pull it for someone who does need one. Oh yeah, no front seats, just panels and rear seat.
What would this stuff be worth? I'd have to buy it from the place so it'd be nice to have an idea.