I have a Blackhawk Convertible 44 mag / 44-40 that I am thinking of selling. It has been shot a few times, but is in excellent shape. No blue wear except for slight cylinder rings. Chambers on the 44/40 cylinder have been reamed to bring all of them into spec. It is in the original yellow box and cardboard sleeve with original manual. I am looking for an estimate of the value of the revolver. Could not find any sales on Gunbroker or Guns America for comparison. I'll post some pictures when I get around to taking them. I would appreciate any advice on determining what to ask for it. Thanks.