Everything depends on the size of the VPN network, level of support, and provided services. For personal VPNs, you can estimate, on average, cost at around $2 per month with at least a 2-year plan. In the case of business VPN, the prices start at around $5 per month.
In most cases, you can test the VPN before deciding to keep it or not because VPNs offer a money-back guarantee, so you can cancel your subscription if you don’t like their service.
You can also use special deals like PureVPN $0.99 deal to test a fully functional VPN for 7 days and not worry about any money-back guarantee procedures because you will not be charged after 7 days if you don’t want to use it anymore.