I have a set of Hagus Mirrors that are for a B5 A4 Audi. They will fit both the A4 and S4 and are wired for heated/ defrost if your car is so equipped as well power.
When I bought the mirrors they did not have the factory harness so you will have to reuse your factory mirror harness as I will need to retain the harness for my mirrors. The mirrors work and look like new with little to no chips at all as they have been well taken care of.
Hagus Still sells these mirrors for $459 and they had a special of $299 on any mirrors in stock (special ended in Feb of 08). These are not in stock as I have called to ask but you can feel free to do the same as I will include their web address.
http://www.hagususa.com/
I am asking $250 shipped and this will include the paypal fee as well. Here are a few pictures of the mirrors installed on my car and feel free to ask any questions.
Thanks
Updated, current pictures:
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