So my father-in-law was over the other day. He was talking about getting a 357 revolver. I showed him my Ruger security six and he loved it. I got it for dirt cheap and it is in good shape. I have wanted a security six for a long time and finally found one. He told me he would be interested in a part trade with some $ for his Colt 1911 commander. I have not seen it but he told me he paid $600. for it. My ? is, how much should I give him for the Colt on top of the trade. The question of doing the trade is an easy one, hell yes for a Colt.