Well a further few aspects of the spec are important - what's the spacing for the rear hub? 130 or 135? And what spoke count are they? I doubt very much that the rear has been rebuilt, it's probably that the anodising has been differently affected by UV. They would not have been anodised in the same batch in manufacture. They are not great rarities - by contrast, I sold some pretty rare Dakkar Mavic hubs recently. Value probably looking at 50-60 for the rear and 25-30 for the front but others may have other views. A quick search shows them selling for about that.