Vintage Cars: valuation, british vehicles, british cars

Question
Ihave vauxhall viva HC 1972 22000 MLS ONE OWNER STORED SINCE 1974 TOTALLY ORIGINAL AND AS NEW.  ANY THOUGHTS?

Answer
Vauxhalls are virtually unknown here in the States, and I have to admit I know very little about them.  I do know that the quality of British cars was probably at its lowest in the early 70s, and (at least on this side of the ocean) the only British vehicles to have collector value are the high-end models: Jaguar, Jensen, Aston-Martin, etc...