Sources for Out-of-Print Books on the Web

ABEBooks
http://www.abebooks.com

Alibris
http://www.alibris.com/librarians/librarians-home.cfm

Amazon
http://www.amazon.com

Biblio
http://biblio.com

Bookfinder
http://www.bookfinder.com

Ebay
http://www.ebay.com

Out-of-print Suppliers list
http://faculty.winthrop.edu/maysa/AcqTools/AcqDept_OP.html

Proquest UMI Books on Demand
http://wwwlib.umi.com/bod

Used Book Central
http://www.usedbookcentral.com