Buying and selling

[newflesh]

Never heard of www.bitcoin.de so I can't really comment, I'd do a bit of research before sending them any btc.

Plenty of other options. Localbitcoins has been mentioned a few times, I'd say they're one of the easiest sites to exchange btc (assuming there are buyers/sellers local to your area).

[manwithat]

You can see some markets here: http://bitcoincharts.com/markets/