Fun place for niche items..

This site has a large variety of items for several popular tv shows, games, movies, and comics. They have a variety of item types, from clothing to dishes, toys, and decorative things for the home. They also offer points with each purchase that can be used to get free items.
As far as price goes they aren't exactly cheap. They will have sales and clearance but generally prices are comparable to other items found on niche sites like these.