Much depends on the overall condition of the guns "original finish" and the box it self, if part of the "package" , then how early a gun, the serial number if LOW can add a 'premium'...around here average "flatgates" run in the $500-600 range and the original "non catalog" number boxes run around $125-150.....the grips need to be original , black hard rubber ( actually 'plasticized')and they run around $90 for the proper vintage....again, the real early ,low number guns, the black eagle medallion will be a "satin" ( dull or brushed finish,not shiny silver) these were left overs from the RST's early on............a picture and serial number would really help......