Thank you for bringing me these items! Here is your prize:

7,164sP

AND

Regular Windchime AND

from library quests

[edit] adding a question is handy xD

wasn't quentin the only one giving out graveyard items?

no, only that the Graveyard Shop was closed and that he was giving out the items as part of his quest. Other quest grantors can and do grant GS items, only they do it randomly out of a large selection of possible things.