That's a very nice bike for the money. The Chorus drivetrain alone is worth a fair amount. But how sure are you about the geometry? The 49 Diva is probably comparable to a small Felt. How does your current bike fit you? How tall are you, what's your inseam, how long are your arms? The Diva won't be a good deal for you if it doesn't fit you. Also, do you know how the Diva sustained that ding? You really have to be mindful in buying a used carbon bike that it wasn't involved in a crash or accident. Did the ebay seller happen to say why she was selling the bike?
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher