I bought a brand new 39 when they were still in production.
I really liked it, but sold it when I bought a 59.
Turns out that I never really got used to the "fat" 59, and missed the slim fit of the 39.
However, the early 39's were not a "perfect" pistol and did have some problems, feeding, IIRC.
Bottom line is that the 39's are not top-tier collectors by any means, but if it's a good shooter, it's probably worth more as a keeper and a shooter than to sell it.
Prices can vary wildly depending upon condition, but it would take a NIB 39 to fetch even close to $600, and there are a lot of nice condition "shooters" I've seen for around $200.
With some
rust and without box or papers, I don't think you'd even see $200 for it... but maybe just.
To me, it would be a candidate for re-blueing (you're not going to hurt the value anymore than the rust does), or maybe a nice Parkerized finish.
Then have some fun and shoot the bejeebers out of it.
