What is the value of a Sears Roebuck and Co BB gun model 799 19021?

I believe this is a Daisy model 104. It has a plastic stock, the rifle is painted black with white decals. It says Sears in a circle in the decal. with a deer on the left decal. The cocking lever is metal and the stock is straight on the bottom. It has a fake hammer and a tube under the barrel. If this is your rifle then in Excellent condition and I do mean Excellent, (like new) it is worth $125 in poor condition it is worth $25