Where can i buy used dslr camera when i go to hajj?

Prefer sony a700 a850, or canon 50D 60D or nikon d80 d90.anyone knows?

In addition to Ebay and Craig's List, you can buy them from many regular vendors, such as Amazon.com. For instance
http://www.amazon.com/...zon.com/s/

Adorama, BHphoto, and usedcamerasonly (ritzcamera) all have used cameras you could buy from them