BUFFY THE VAMPIRE KILLER (1992, Fox Video, 82 minutes) THIS is one film which deserved better reviews as well as box-office success. Kristy Swanson plays Buffy, a Los Angeles ''valley girl'' who is pre-ordained to hunt down vampires. With Donald Sutherland and Luke Perry watching over her, Buffy takes on a pack of bloodsuckers led by Rutger Hauer. Buffy the Vampire Killer is a simple film with no pretence at providing anything other than fun, and this it does very well. SCORCHERS (1991, Fox Video, 78 minutes) SCORCHERS is a film about a day in the life of three women played by Faye Dunaway, Jennifer Tilly and Emily Lloyd. The day begins with town prostitute Dunaway providing service to the local priest, who then rushes off to conduct Lloyd's wedding. Lloyd's bridesmaid, Tilly, then rushes off to kill Dunaway, when she realises her husband has been calling upon Dunaway's services. This is the sort of film which has neither an ending nor a punchline, relying solely on the ability of the actors to make it a success. With a cast which includes veterans Denholm Elliot and James Earl Jones, Scorchers had, theoretically, all the credentials to become a success. But performances range from disinterest to utter hysteria, leaving the viewer wondering what the fuss is all about. ACES - IRON EAGLE III (1991, IVL, 95 minutes) IT IS almost inconceivable that Louis Gossett, a winner of the coveted Oscar for An Officer and a Gentleman, has sunk to such depths, returning for a third time to head the cast in this dreadful Iron Eagle series. This time, Gossett leads a pack of World War II veterans against South American drug lords. The catch is they are flying planes more ancient than themselves. Body-builder Rachel McLish fills the part of voluptuous bimbo, in this predictably disastrous action adventure.