All of these sites have wonderful products & services!

Auctions
Auction Witch My favorite of the pagan auction sites
E Pagan Auctions Great stuff here-lots of selection
Mystic Auction Smaller site, but some nice stuf
Ebay It's ebay

Favorite Sites
Moon Muses This site's products are wonderful and unique. One of my personal favorites
The Dragon Den Great selection & wonderful prices
The Pagan Barter Place Great Pagan Barter Community. You have to ask to join, but its well worth it
Bright Heart Wicca Wands This lady is super nice, and she has the most unique, beautiful wands I've ever seen. Reasonable pricing too.
R'Chel Enterprises
Lots of great stuff here & tons of selection
Pagan Creations Great products, and the owners are super nice!