You did the right thing when you rescued those rounds, but have no idea what they're worth.
That round gets mentioned occasionally in articles on the .22 mag. Some feel it should have been modernized instead of gassing up a .22. Truth be told, the superior .25/20 isn't exactly setting the world on fire now either, because the hunting of edible small game with a rifle isn't very popular any more, sad to say. I suppose the rimfire .25 was cheaper to feed, but still the market is pretty small. Honestly, I've never found the .22LR lacking for squirrels, rabbits, and such, and doubt the .25 Stevens offers any advatage over HS HPs for chucks.
I believe it was chambered in the little Stevens single shots and also some revolvers. Wiki it for ballistics.
