Ask your bike shop about any even older Vitas or similar they might have. If they have a 2014, for example, if you buy it "new" the lifetime frame warranty applies. If you buy the used Sport, you might get a great bike, but no warranty.

I ride a 2015 Vita Elite - best investment in health and fitness I've ever made. The fit needs to be right for you, so if ANYthing about the used one is "off," go for the newer one even if it's lower end. Upgrades can happen.