I recently (last year) put up QuakeRepo.net which contains maps, textures, location files, models and sound files (basically all these files are related to the maps on the repository, i.e. required files).

I thought maybe I should add demos to the repository as well.

If you have official (competitive) tdm, duel, fortress or ctf demos, I'd like to get them and put them up on the repository.

It's also very easy to mirror the repository if you want.

Right now I'm downloading all the NQ/QW demos from http://demos.igmdb.org/LeopolD/.

https://archive.org/search.php?query=challenge-tv

Also some old competition demos at http://methosq.com/qdemos.htm