Just for the record, Xavier's gun is a "tricked out" Ruger Government Competition model. Don't expect to get those custom grips and muzzle attachment on a new one. Nice gun X, btw.
As far as a standard Ruger Mk II, I'd snap one up NIB for any price under about $250. I wouldn't have paid that much for a "plain jane" fixed sight version a year ago, but now they've pretty much dried up in the commercial pipeline and I would pay a bonus to get a NIB Mk II over the "new and improved" Mk III. I prefer the design of the Mk II and don't want to have to stock two different kinds of mags for a .22 Ruger.