I think the best lip plumper is Aminogenesis Lips to Love. It comes with a vibrating top that I never use. I didn’t think using the vibrator made much of a difference.
It normally sells for $50, but you can look around online and get a better price.
Second place goes to LipFusion XL – It will plump, but not as well as the Aminogenesis. It also sells for $50.