Can I use a unlocked iPhone 6 on Verizon?

Where to et a unlocked iPhone 6 that works with Verizon and can it work

Apple doesn't sell unlocked ones yet. They're only available through carriers still.

You won't be able to use an unlocked iPhone on Verizon regardless because Verizon will only activate Verizon-branded phones. It has to be a Verizon iPhone or they won't do it.