Right, well i've come across a few in the past week thanks to that thread about turbosquid sooo...
Here are some pretty good sites i've found or have been told about!
Not all of them are paysites, some are just places where you can show your work, and allow others to use with attribution (think that's the word)
Anyone is free to add to this, in fact i'd be glad if some people did... my links are a bit thin on the ground
(On most of these sites, my username is "JoeTheWiltshire")
http://www.3dvia.com/http://www.voeveo.com/http://www.turbosquid.com/?gclid=CP7V8PiBpJsCFZ4U4wodUHcoDAWill try to add more if I find any good ones.