RS6 Avant German Price List and Catalogue:

http://www.audi.de/content/dam/ngw/assets_migration_fixes/PDF/models/130307_KW10_RS6_Preisliste.pdf

http://www.audi.de/content/dam/ngw/assets_migration_fixes/PDF/models/Audi_RS6_Vs00_WEB_PDF.pdf

BTW, fully speced RS6 Avant with Dynamic Package Plus-305km/h, Ceramics, LEDs, DRC Plus etc. is around 132250€ in Germany with Mwst. That is actually pretty good price since all competitors are more expensive. With same options E63 S T model is almost 15K more. Cayenne TS is around 155K.