Originally Posted by silentt
It's a swapped car.
I have been told by numerous subaru mechanics (or ex subaru mechanics) that those pieces should be replaced whenever they come into contact with any oils. If there was oil on my fingers, it will lead to improper wear (and hardening) of the belt and can cause skipping. I'd rather not have a $100 timing belt cause my $6000 engine to be destroyed. As for the gaskets, I never reuse gaskets, ever.
You could wash your hands or wear gloves and save the 100 dollars on the belt. I've taken mine apart more times than I'd like to count on my race car playing with different oil pumps and have never replaced it. At 6K, you're just throwing money away. By your logic, just a little bit of oil on your hands when installing a brand new belt could cause it to fail. If you apply to same car to removing the old belt to avoid getting oil on it that you were planning on applying to the new belt you'll be fine.