Is there a rule of thumb on the value of a consecutive pair. I would assume the older the guns the more value would be placed on the pair. I have a couple of sets. 6 1/2 inch super blackhawks from 1966 and a pair of 7 1/2 inch flattop 44's. from 1959. I know what the individual guns are worth but don't know what premium the pair would be worth.