The cheapest one with great reputation is https://nordvpn.com which has received many awards.

NordVPN is based in Panama, as the country has no mandatory data retention laws and does not participate in the Five Eyes or Fourteen Eyes alliances.

As of June 2018, NordVPN runs over 4,410[16] remote servers in 62 countries, with the largest numbers of servers located in United States, United Kingdom, Canada, Netherlands, Germany, Australia, France and Sweden.[17] Besides general-use VPN servers, the provider offers servers for specific purposes, including P2P sharing, double encryption[18], connection to the TOR anonymity network, and protection against DDoS attacks.

In 2017, NordVPN launched a number of obfuscated servers designed for using VPN under heavy Internet restrictions.[20] These servers allow accessing the service in countries such as the United Arab Emirates, Saudi Arabia, and China. Although the Chinese government has been attempting to restrict encrypted communications for years,[22][23] millions of people still rely on the technology to bypass China’s censorship system, known as the Great Firewall

• Source: Wikipedia

one NordVPN account can secure up to 6 devices at the same time.

Also check out https://substratum.net The open beta can be found here. You can technically use it at a negative cost. But it's still beta and the UX is nowhere near smooth.