It was extraordinary that two emails about Audi RS4s should arrive on the same day. Another reader gave me a tale of woe arising from the high maintenance costs of brake discs that only last 6000 miles, tyres that last less, and vulnerable clutches and flywheels. What has happened is that this has made dealers very wary of the cars. There's no point in selling an RS4 at a £4000 profit when the customer could come back demanding £5000 of repairs, and because they are so rare they are not 'booked' by Glass's Guide.

I've found a 90,000 mile 2007 asking £17,990, a 67,000 mile 2006 asking £17,995, a 68,000 mile 2006 Avant asking £20,500, a 63,000 mile 2006 Avant asking £21,990, a 58,000 mile 2006 Avant asking £22,480, a 67,000 mile 2006 Avant asking £22,990, a 46,000 mile 2007 asking £23,980, a 43,000 mile 2007 asking £24,500, a 46,000 mile 2007 Avant asking £24,995, a 20,000 mile 2006 asking £25,000 and a 58,000 mile 2007 cabrio asking £25,000.

You could try advertising on Pistonheads (as these were) and Autotrader, but do not allow any driver who does not have trade insurance to test drive it. Safer to use eee.sure-sell.info , but they will probably advise a Top Car auction. Or try used Audi specialist Marc at mpmlimited.co.uk