The lock might be getting knackered. Happened my wifes punto, as there was no central locking. Years of use can wear it down, especially if a previous owner was a bit rough with her
My bro might be breaking his GS (to fund the repair of the GR I sold him), so if you need a full set of locks and ignition barrel, there may be some on offer.
97 Manual GPX. Icecelle Blue.
Other Stuff: Induction kit. Front Strut. Apex Lowered. 17" Kahns. Quad exhaust. HID lights. Glow dials and rings/cups. Black leather seats. Window tints. Sunroof.