I picked up a DS last year on Gunbroker for a very good price. It has a little "freckling" (surface rust), but this is destined to be a project gun. I have a place in line with a Colt specialist to do a DAO conversion on it, plus an action job and chamfer the chamber mouths. It'll get refinished after the metal work is done - might do one of the Robar finishes on it, like NP3.
That tight, "bank vault" lockup is an impressive Colt characterisitc.