I have been looking for good low mileage L322 Vogue for some time. Mileage seems to be the driver not age with 70k plus ones being advertised sub £10k although everyone I looked in this price range had had a hard life.
Super low prices less than £7k are normally there for a reason.
I have just picked up an absolutely mint T 03 TD6 with only 48k.
Get the gearbox serviced. Save yourself some heartache.