I just got a revised estimate from my contractor on a house I am rehabbing - an extra $3800 to replace copper pipes stolen over the weekend.
A lot of new constructs have switched over to PVC from copper. It's noisy and eventually does break down but it's a heck of a lot cheaper.
When we built two years ago, we used copper. We're just grateful we bought before prices shot through the then-unshingled roof!