Does anyone know any websites that have good 3D models or Sound effects that are free or at least cheap???

I think you are a bit too unspecific with your question. There are tons of sites with free stuff, Renderosity itself has a large section for example.

try also doing a search on google for creative commons licensed music.  I found a few sites that allow their music to be used in anything, without charging royalties or making you beg to use them.  Some (most) simply request their name be added to credits, with a link to their music.

and yes, renderosity has one of the largest archives of free stuff I have ever found, and its nicely organized, too (use the search feature to help narrow things down)

Content paradise occasionally has freebies, including music to be used in your work.

also... www.sharecg.com is another place to look for cool freebies.

And for those who love to import items into Vue...
http://3dcollections.net/ - one of the largest architectural & interior decorating 3D collections i've managed to find.  most of these are in .3DS form (importable) and other forms as well.

there you go... there's a start.  should keep ya happily downloading for a while =D  ;)

 thanks

Attached Link: http://www.posertrax.com

I have many free sound effects, loops, and music files at my Posertrax site which can be used royalty-free. Just click on Freebies and there they are. :)

Hope this helps in your search!
--Donnie