How much is a Daisy Model 21 in excellent condition worth?

There are two versions of the model 21 "Side by Side"

Ver:1 plastic stock Mfg 1968-72, Excellent condition $650 to $800

Ver:2 wood stock Mfg 1968 only, Excellent condition $875 to $1.100

Add 30% for checkered grip

Add 50-100% for one of the 48 Walnut sets mfg by Reinhart Fajen, Inc