Can i unlock a verizon iphone 4s?

I found one on craigslist that i want to buy. I just want to 100% know that if i buy it, will i be able to unlock it? Whether its myself, or at a store? They said there are no problems with the iphone and it has a clean esn. I know people can lie on there, but if what they're saying is completely true, can i unlock it no matter what? I don't wanna spend my money for nothing.

Yes you can unlock it no matter what. Even if the phone is still on plans you only have to pay a fan for the network.