mitchnola
, I'm not familiar with that particular knife, but have seen a few Shiro "Customs" and believe that some of them have gone for 5 figures, though I don't recall seeing any in the 20's. Inflation can be a Bear, though.
I used the term custom in quotes as my definition of that term in my career as a builder and master carpenter relates to a home built to order for a specific customer--a Custom Home. For Shirogorov, while there may have been knives built to a certain spec for a buyer--read, "custom ordered"--their terminology refers specifically to "Sergey's Customs", their highest end knives, designed and built entirely by Sergey himself and available by auction.
Shiro's various categorizations include two levels of Production Knives--the "entry level" equivalent to what was once the One Bear tier with G10 handles, SRBS pivots without underlays, steels such as Elmax, and no jimping or interior milling; their "upper level" of those feature MRBS with underlays, pricier handle materials and steels, with jimping and/or blade extracts plus interior milling, The latter were equivalent to the former Three Bears or R Series knives. Newer within Production Knives is the Ursus category, so far only inclusive of the Quantum NL.
Next up are the Collaboration Series with makers such as Tom Mayo, Dmitry Sinkevich, RJ Martin, Brad Southard, and others plus their "Custom Division Knives" which are more elaborate versions of their higher end production knives. Both these categories generally have been priced in the higher teens, short of 2K. From what I've observed, the collabs initially market for higher prices right after selling out, but drop in value later. I believe Custom Division runs are more limited and those knives may hold their value better.
My only upper tier Shiro--the CF Russian Doctor Death Tom Mayo collaboration--went for around $1800 new. I got a generously good deal from a friend here for around three quarters of that.
As to "Sergey's Customs", well, if there's a market of one, then there's probably a market of two or more. I guess something unique like that would hold its value or appreciate. Probably not knife to take to the job site if you wanted to get your money back out of it....