I have two sets of RS6 turbos. Both worked great when pulled no excessive noise, compressor fins have on the higher mileage set have some minor edge pitting but it did not affect their performance at all. One set was pulled from a car with 150k miles (and quite possibly may have been replaced before because they are in great condition), and the other set pulled from a 119k car. Thought it would just be easiest to post the link for the ad I put on ebay:

Set 1 (119k)
http://www.ebay.com/itm/182244874505...84.m1555.l2649

Set 2 (150k)
http://www.ebay.com/itm/182244901329...84.m1555.l2649

If any members are interested, I'll sell the higher mileage for $900 and the lower mileage for $1000