How long those a vampire live?

There is a folklore that says that vampires never die, that means that vampires live a lot of time. Most of the vampires have more than 200 years, because if count from the time that there was a rumor that vampire exists until now it is a long time. That doesn’t mean that all vampires live forever, because as you can see in the past posts I informed you how to kill a vampire, that means that vampires can’t edge, but they can be kill by humans with wood stick, silver and etc. They could even be killed by themselves or by werewolves as I mention it before. Until now, we haven’t discover why if monster can die by edging then why vampires doesn’t; this have been a mystery until nowadays, even though we don’t care about that because many people from the world doesn’t believe that vampires really exist. This could be because they can’t imagine a vampire or a creature that doesn’t edge even if it have pass 500 years, so this could be a reason for many people not believing that maybe the vampires really exist. Even though we want to prove that they really do exist, it would be really difficult because those vampires can live a long time and if may realize at the last moment that the person we know was a vampire and wouldn’t have time to tell the others. Now, we can conclude that vampires can live as much as they want without edging, but they can also die by being killed by a person, werewolf’s or themselves.