I usually use local forums. Trade with trusted people. I dont trust web sites. Only trust honest people who i know before. If i have a history with a guy so trade can be easy.
Selling bitcoin websites lookin cold for me. Some of sites needs lots of things and lots of fees. I hate procedures.
Its so easy with a reliable guy. Send money take btc. Easy peasy. No procedure.
For some it is convenient. If I were you, I will not risked my BTC to exchange with other person with no escrow or any midman present in the transaction. Nowadays, even the most reputable person can scam (if he wanted to). But I'm not saying that in the sense to make you loose trust on the reputable persons here in the forum since there are lots of them you can trust.
But if you are comfortable with that kind of transaction, we can't prevent you from doing that. Just be sure to always check the reputation of the person you will trade to prevent or lessen the risk of scam. And as much as possible, hire an escrow (for the safety of both) if transacting with someone.