I was just quoted 6 hours at $60/hour to do the timing belt, water pump, main seal, cam seals, and tensioners on a 97 2.8 A6 Avant if I supply the parts. Parts are about $235 from Blaupauts including Audi Anti freeze and a free serpintine belt.. So I figure it will cost about $600 -$700 . The guy knows Audi's -- For that price I won't even think about doing it myself.... I'll even be willing to buy him a few cups of coffee and a some donuts from Mr Duncan...