Take, for example, the huge discrepancy in pricing of the Cos d'Estournel, a French claret. The 2000 vintage costs £580 a case before duty and VAT, but the same wine produced in 2001 will cost £390 a case, and the 1993 vintage, which many punters might perceive to be better because it is older, costs just £285 a case. This is a price difference of more than 100 per cent for a wine many people might think is exactly the same.