Below is what the 42nd Edition of the Blue Book of Gun Values (copyright 2021) says:
STURM, RUGER & CO., INC.
NO. 1-AB Various cals., .204 Ruger (mfg 2006-2008) cal., 22 in. barrel, checkered walnut stock and forearm. Mfg., 1967-1968, 1982-1983, 2006, 2008). Although uncatalogued beginning in 2009, very limited runs of this model in various calibers have continued to be produced by Ruger including a rare chamber in .338 Federal in 2016 and 2017.
100% - $1000
98% - $750
95% - $625
90% - $500
80% - $400
70% - $350
60% - $300
Last MSR - $1147
Add 20% for .338 Federal cal.
The "AB" suffix designates semi-beavertail forearm with light barrel.
Hope this helps. I saw they were accepting orders for the 43rd edition a month or so ago so don't know if it is out yet so there could be slightly better info available.