Not timing per se, but I have found desirable revolvers when I had no money or I had the money and didn't know enough about what was for sale.
I was at a gun show & a guy walked by with what he called a "1917". I looked at it, as did another guy. The seller had a .455 Triple Lock that had been altered for .45 ACP/.45 Auto Rim. The price was $135. I had the money in my pocket, but the rent was due.
A few years later, I was looking at a revolver that didn't have the cylinder release and nut. The seller wanted $135, but I passed because of the missing parts.
What was the revolver in question? A 1950 Military in .45 ACP/.45 Auto Rim, which was an updated 1917 with the short action. S&W only built about 3976 of those rare bad boys.
If anyone at a gun show ever offers me a firearm for $135 again, I'm going to buy, regardless of what it is.