What is a fair price to pay or charge for a ColtMaster rear sight? I know they are fairly rare so is it one of those items that people just jack up the price on and eventually someone bites? Does having the period correct rear sight on a revolver increase its value even if it is a nice shooter grade (not 100 percent mint)? I'm trying to decide whether its worth putting up the cash to bring my Officers Model Special back to its original state. Thanks guys.