Good day!
I Know the USA and Canada did not get the C6 RS6, fortunatelly it was sold in Mexico. I went to Autoplaza.com.mx and just found a C6 RS6 AVANT for sale with less than 19,000 kms!
Here is the link if someone is interested and has the way the legalize it in the USA.
http://www.autos-usados.autoplaza.co...A24542144.aspx
DISCLAIMER: I DO NOT KNOW ANYONE RELATED TO THIS SALE, I AM JUST INFORMING HERE IN CASE SOMEONE FINDS IT USEFUL.
Ghost-