For genuine autographed photos & items
www.toppixautographs.com - Excellent customer service as well
For autographed books - stores that hold regular author events check the websites for lists of upcoming author/artisit appearances
Vromans Bookstore - Ship Internationally
Booksoup LA - Ship Internationally
Outwrite Books - Ship Internationally
Boulder Book Store - Ship Internationally
Bookends NJ - only ship within USA
Barnes & Noble The Grove LA - only ship within the USA
For other autographed books
To purchase professional photos:
also ebay is a good place to look as I have found many vintage publicity photos etc...
To get professional prints of your own photos
Bookplates
Websites of other collectors: