How much is a 1917 daisy bb gun worth?

It's not easy to set a value without knowing the condition or model number of the rifle.

So here's what I suggest. Daisy offers a service to Identify older Daisy's and give an estimate of value. See the link below.

The rifle is blueish in color, wooden handle, 500 shots and still fires great, Its in Excellent condition.

It sounds like you have a Variation 4 model B 500 Shot (Not a Red Ryder they started in 1940 ) the Model B had a Blue finish and wood stock .it was made between 1910-23. in Excellent condition it would be worth around $245 - $300.