The HK91 is rather valuable in the United States firearm market since it was banned from further importation by executive order in 1989. Only 48,817 HK91s were imported into the U.S. prior to 1989. The retail price for an HK91 in the late 1970s was roughly $380 for the standard A2 models and $50 more for the A3 version. Prior to 1979, H&K did limited production runs of HK91s with polygonal rifle barrels. These were only $10 more than their standard counterparts. Today, original HK91s often fetch over $2000. The early 50 1974 "SACO" imports that are in good condition and have the old style "SF" marked grip frame housings can bring a premium and are very desirable among H&K collectors. So are the 1988 and 1989 "Chantilly" models, which have the same satin semi-gloss black finish as the later HK SR9s.