instrument cluster very dim, replacement cost? on 2000 Audi A6 Quattro

What would be a reasonable range for parts/labor to replace an instrument cluster? Are used an option and worth the risk?

2 answers
use bba but send yours to be rebuilt. it saves on mileage and programming issues.
Removal and replacement of the instrument cluster and reprogramming is a little over two hours job,
This company rebuild instrument clusters
http://www.bba-reman.com/content.aspx?content=audi_a3_instrument_cluster_dashboard