What is the value of a Stevens Favorite?

There are 17 different models of the Stevens Favorite listed in the Standard Catalog of Firearms. Except for the 1st Model (has a removable sideplate) and the Ladies Model (checkered walnut stock and Swiss buttplate), the suggested values in NRA Good condition range from $150 to $250. Some versions were made from 1893 to 1939, others were introduced and discontinued at various times during that period. You might want to find a copy of the Catalog or Flayderman's Guide to Antique American Firearms to determine exactly which model you have.