I never viewed the regular Diamondbacks (DBs) as "collector" pieces until I was forced to accept reality. My first good 22 revolver was a 4" blue DB. I liked the good old days when you had to decide between S&W or Colt at about the same pricing and both were consistently good overall. I always chose Colt and only started buying Smiths in the last 10 years. Prices on Diamondbacks hovered around $400 for years at shows.
Now, I just look at the prices and shake my head. Sometimes, I wonder why I even bother to keep them. Probably has something to do with greed, my history, and the fact that I sold my original Python for about $600 as prices were rising and the same gun would run at least 3x that today. I sold that gun with pachmayrs on it and still have the original stocks somewhere in my "stuff". Forgot to take the grips with me that day I sold it. So, I could reap a bit of a bonus selling them if I wanted to. The gun is still the same. I don't regret that sale really. I purchased a NIB 6" DB 38 spl with the proceeds and a little cash that day. That gun is much much less common than the 98% 6" blue Python I sold. Some day it will help pay for my retirement whims or pay the mortgage for a couple months.
Now I look at my DBs and always ask myself the question, "Do I really want to shoot that when I have others to shoot?" The answer has been consistently "No" for the last 10-15 years. That bothers me.