I think it does depend entirely on the individual bass: my old 78 Jazz was a shocker - 11lbs 13oz, and not a great player, either, but it was mint and all original. The buyer spent a fortune on it, so they must have wanted it (they played it first), but for the life of me I don't know why.
I think it speaks volumes that the highest prices are commanded by the ones which are most 'original', which have the ashtrays, and the original case. Says more 'artefact' than 'instrument' to me...