The Inauguration Day Official Commemorative Souvenir Cover sells for $9.95, and can be ordered via www.usps.com/stamps or 1-800-STAMP-24 using item #788721. Preorders are now being accepted. Select Post Offices™ will sell the souvenir cover beginning on January 21, 2013.
— Stamp Products and Exhibitions, Marketing/Sales, 1-10-13