What year/model is this specialized allez?

Hi. I’m a looking to get into cycling and have been looking at several used bikes. I found a specialized allez on marketplace that seems to be a good deal. The seller said it’s from 2015. I looked at specialized website but I don’t see the exact bike with the color pattern on their website. My questions are: Do you think this bike is from 2015? Is the the base allez or some other version of allez line up Is 500 a good deal for this bike?

Thank you all for your help