Everyone has opinions. Those opinions are influenced by many factors. The fact is that all gun prices are on an upward trajectory at this time. But there are still good deals to be found.
Often, we base an opinion on "what would I be willing to pay". For both the guns you mentioned, IMO, they are both priced in the ballpark. Having said that, the 14-4 would not interest me at a price of $1k. There are lots and lots of 14-4s and it is easy to find them at lower prices. However, at $700 for a very nice K-38 Masterpiece, I would be reaching for my wallet. The older (pre model marked guns) are getting harder and harder to find, especially in nice condition.
Case in point, I obtained this K-38 late last December. It was shipped in 1950. I gave $589 for it. I thought it was a great price and am very happy with it. In my database, I have it valued at $700, but I think it is worth more. It's not a museum piece, but it is still pretty darn nice. If the one you are looking at is as good or better than this one, to me it's a no-brainer.
But that's just my opinion.