I've been using a 1998 Creation Catalog for early photo references. Here are a few pages:

Sites

These are sites which I take pictures from as examples when I don't personally have a copy, or that used in the past before the site disappeared :(. Some sites are for reference purposes only. Thank you to all of them:

• Anything for a Dinar? Xena Collectables Guide
• Mike's Images permission confirmed
• XENA RULZ permission confirmed - site retired
• Michelle's Xena Picture Library
• Tom's Xena Page
• Xena Media Empire - site retired
• MaryD's - XenaMedia permission confirmed
• ROCNet - A Reneé O'Connor Site
• The Less Than Legendary Journeys
• XENA SOULMATES
• Hudson Leick Online

I also have been more recently using photos from eBay for examples of pictures, especially from the seller Deankh. I have bought many photos from her and she often has very reasonable prices on Xena photos. She also has the immensely helpful habit of listing the actual Creation code for most photos she sells. I've only had positive experiences with her and I recommend her highly.