TurboSquid - TurboSquid offers 3D models for professionals.
Shutterstock - Shutterstock is a provider of stock photos, illustrations, and vector art. The website allows individuals to purchase a subscription and download copyrighted art for creative projects. Read more about Shutterstock.
3DOcean - 3D Models & Accessories From $1 for 3D Models, Textures, Materials & Shaders, 2D Concepts...
motosha - Real free high quality stock photos for commercial and private use! From selected professional photographers. Simple download without registration, without obligations. Best quality and 100% Free.
STLFinder - The 3d models search engine.
Negative Space - Free stock photos