I am sure. DRC is a loss, as i said above CPO is well worth it but i think RS4s have a few less obvious problems than RS6s and you can always buy an after market warranty. The gentleman's cars are good, may be worth pursuing this one rather than the red one.
Go over to the RS6 forum and email jbtexas as he just bought the RS6 from the same guy.

2003 RS6 Daytona Gray, Silver Interior
RNSE
RS6 logo matts (waste of $$$)
RS6+ OEM 19" Titanium 5 spokes(summer)
RS6+ Dead Pedal
Stuck with it forever-depreciation rocks!
Go Gators
Future
R8 Phantom Black/Silver or Ibis- In longggg line
Former
2000 TT Coupe Neiman Marcus #25/100
2001 BMW X5
1994 Audi Cabriolet