As a resident, it's always worth a try to get a new text for the departmental library. If nothing else you can check them out enough to decide if it's worth getting for yourself. I always thought it a good idea to have a small departmental library book fund which residents could have a hand in updating.
If your med school library is close by (and there isn't already one in the departmental library, obviously) can always try to check these texts out there. Of course even the good libraries often don't have subspecialty pathology texts, especially current editions, so that may be fruitless.