Re: Stevens Walnut Hill 22 cal
The No. 49 Walnut Hill was in the top bracket of the Stevens target rifle line, just below the Schuetzen rifles in price. The difference was not in shooting quality, but in the stocks, accessories and engraving.
The Walnut Hill was made on both the 44 and 44 1/2 actions; in top shape, those on the 44 action will run around $4500, those on the 44 1/2 action will bring $6000. The No. 50 Walnut Hill had fancier wood, but will run in the same general range. Collector interest is high, but unlike, say, Winchesters, somewhat limited.
They are fine rifles and as such were generally well cared for, so it is not surprising that yours is in good shape. It deserves good ammo, so splurge for Eley match or something of that quality, not the latest super-duper hotshot ammo.