Seems like every time a Ruger ____ Six gets brought up, there are two camps: those that say it's a fantastic deal in guns and you should snag one, and those who claim we hardly EVER see them priced in such a way that makes them a great deal.
We've already done that in this thread.
I never find them for prices under $450, which is what I would be willing to pay for one. I believe that if either of the ones you linked will sell around there, either would be a fantastic purchase.
I'd say the one with the original wood grips appears to be in better condition, but I can tell you that most normal folks (myself certainly) would
HATE those grips. They suffer from the same problem as the many years of the S&W Magna stocks did, they simply don't fill that area between your hand and the trigger guard and they are uncomfortable and don't inspire confidence. So it would be my prediction that if you bought the nicer one, you'd be next searching for grips.
Grips are personal of course... but as a guy who formed his opinions in the 1980s, I still love the gaudy Pachmayr gripper grips and I have
so many sets of Pachmayr grips in my collection that it might seem irrational if I totaled them up.
When looking at a ___ Six, it's my opinion that you have to look at it as a useful tool and get away from any motivation that wants to suggest it's "collectible." I suppose
anything that people may want or like that is no longer in production can be some level of "collectible" but these revolvers were a working man's tool and marketed specifically by Bill Ruger to hit a price point that the average American working man could afford to spend on a quality tool. If it's not some limited or scarce variant specifically made in a short run for some purpose, it's simply not an investment. So when looking to spend money on a Security, Speed or Service Six, compare what you are getting to what you would have to spend to buy a newer GP-100, which is the evolution of the design and is... at least in theory... a better revolver.
Nostalgia is great, but don't confuse it with value, scarcity or collectibility.
I would love to add either of those revolvers to my cache, but not if the price gets to $500 or goes beyond.