i'd go back to '83 and buy all of AF series two. and then to 1987, 1988, and 1989* to pick up a Snowcat and Frostbite, Mauler and Heavy Metal, a Tomahawk and Lift-Ticket and Killer WHALE and Cutter... then flit over to the US and swag a Mamba and Gyro-Viper...
*UK release dates, before anyone says anything...