AA Exhaust Install

I was wondering what the price range for getting the AA exhaust installed on my 328i would be around. I know all shops are different, but I just wanted to get an idea of what it would be costing me. Also, how difficult would it be to DIY? Anyone have any experience with this? I've searched around the forums and haven't really seen an answer, but if I missed it I apologize and just point me in the right direction.

Thanks!