I recently purchased an early beretta 92 with the heel magazine release. Looks to be in at least 98% condition and unfired. Has the step down on the slide. The bluing is deep and amazing. How many were imported? How many had the step down in the slide? Has a beretta gun case but doubt it's original. Are these collectible? What are the values on these? I gave $450 at a local pawn shop. Any information would be appreciated. Thanks again.