Relative to its original sticker and its exotic engine, the C6 S6 trades cheaply — owners frame it as an 'ubersedan' available for a fraction of new cost. The trade is upkeep, so the value is real for buyers who go in eyes-open on V10 maintenance.
An underrated V10 ubersedan bargain
Audi S6 (C6) · value-and-market