Hi there,

If that Audi A4 has done 60,000 miles (100,000km), then it should be worth €15,000 or thereabouts. If it has done 600,000 miles (1,000,000km!), then it will be worth considerably less than half that price, most likely – 250,000km A4s on the 132 plate only fetch €9,950 or thereabouts, for example.

Note that the Carzone App (both Apple and Android) features a Valuation Tool.