VirWox was the most reliable way to do this back then, despite of the high fees. It seems to still be working now but can't vouch for it since I haven't used it in a while.

Here's a quick guide guide https://steemit.com/cryptocurrency/@myhealth/sell-bitcoins-with-virwox-or-btc-usd-or-or-withdraw-bitcoins-using-skrill-or-paypal