Are you talking about just the fiberglass roof, or the whole hardtop? I've seen the whole hardtop for sale anywhere from $50 on up to well over $500 for one in great shape (not saying it sold, though). The doors are about in the same price range. It really depends on what kind of shape they're in and the market of your particular locale.
Are you selling or buying? Pics would help with guesstimating price.