How much should I rent my dedicated ubuntu(linux) server out for?

We have 60/17 speeds and a dynamic IP but I have a dyndns account setup. The server can be used for anything and is completely dedicated. I use it for nothing anymore. There is a AMD athlon II X3 cpu 3gb ram and a 500gb sata hdd. It has 99% uptime. So how much should I rent it out for?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).