How much does a VPN cost?

Excuse me, I was wondering if you could help me understand the cost structure of VPN services. I've heard that there are a variety of options available, from free services to more premium paid versions. I'm curious to know, on average, how much does a VPN service cost? Are there any factors that influence the price, such as the level of security or the number of devices that can be connected simultaneously? Additionally, is there a general consensus on whether the cost of a VPN is justified by the benefits it provides, such as privacy protection and secure browsing? Thank you for your time and assistance.