The value is up to the buyer. I determined after buying a few of their items (always on sale) that they would be worth full retail to me (because they really are nice) if I were making six figures. But since I'm not, I wait for the sales.
I have not purchased their bibs, so I can not comment on them specifically. In terms of classic vs. core vs. pro team, I did purchase a "special edition" jersey from them that was only 120 bucks full price, so I can imagine it's more than likely close to what I would expect out of a Core jersey. It was a good fit, but not nearly as nice as the pro team jerseys I have. The pro team jerseys have much more stretch without feeling loose and they wick/breath a whole lot better. Nicer than any other jersey I've had. Plus, if you catch a sale they are only a little more than the Core jerseys. I also have a brevet jersey that is awesome for Texas "winters" or chilly fall/spring mornings.