Fake Rolex watches have been sold for years on Craigslist. Craigslist has been repeatedly notified when individual sellers advertise on their site, but Craigslist does not remove the ads. Here are 2 current ads. One of these is a dealer who repeatedly advertises various fake Rolex watches:

http://siskiyou.craigslist.org/jwl/***7112096.html

http://chico.craigslist.org/for/***3758331.html