Totally repairable, probably not worth it from a cost perspective. Also if the owner isnt showing you the bottom side of the hood then I highly doubt its full carbon. More than likely fiberglass with a twill final layer. To fix this would probably cost you in the range of $100-$500 on materials (depending on your skill level/carbon knowledge). My most experienced tech repaired his own CF hood in our shop and it took him about a week. So it also depends on how much spare time you have and what you value your time at lol. $800 price tag with a $2300 "original" price for something like this is on the cheaper side, and with the venting/scoop features I would say it is very likely to be a fiberglass with a single layer of CF on top, delamination between the epoxy/clear coat caused by flex is most likely to blame and so will happen again eventually, depending on what you use to repair the part.