An absolute legend, not only for what it accomplished, but for what it helped to spawn for the decades to come. The success of every Audi since was birthed from the legacy of this beauty. Looks like it's in superb condition, although that price seems a bit high.
I'm not all to familiar with these old Quattros, so maybe it's a decent market price, but for that much money, I'd probably pick its arch-nemesis, the 037. At auctions, I believe they go for about the same price.
I was sure you'll prefer the Lancia 037 :-)
The Group B was a fantastic competition... too bad this ended with the death of a driver and his codriver.