30 years experience in the book business
Note on charitable contributions of books made in 2012

If you have made a donation to a charitable or non profit organization in 2012 it's not too late to have the collection appraised.  You're entitled to a tax credit. If the total value of the collection is $5,000 or more, you will need an independent appraisal. Contact me for further information.  You can file an extension or an amended return.    Check with your CPA regarding this.