This immaculate 2006 Audi S4 Avant is a rare find in Moro Blue Pearl Effect finish, boasting an upgraded V8 engine from a recent $25k service last June. This original-owner 6-speed manual station wagon showcases Audi's quattro all-wheel-drive system with a Torsen center differential, making it both powerful and capable on varied terrains. Currently parked in Littleton, Colorado, this German beauty is listed for $5,000 but has no reserve.