Hi guys,

Peachy recommended I advertise a computer on the ETH forum as well.
I think it is also a useful site if you are on the 'lookout' for something:

http://www.marktplatz.unizh.ch/index.cgi?lang=0

maybe it could become a sticky... Do you know anywhere else to buy/sell your stuff?

I have also used this website before:
http://www.gratis-inserate.ch/
(it is not in English but I've managed to work my way around it with some translation tools!)

Ebay, and Ricardo are good places to buy, and sell things

you can try www.craigslist.com