AppleCare cover question?

I bought my brothers 15-inch MacBook Pro (mid 2009). The warranty is about to expire in August so i'm thinking of getting AppleCare, except there might be a small issue. On the left side of the screen border there is a small dent which is hardly noticeable. The dent can be seen, if you look for it in that specific area. I took some pictures and please let me know if Its worth getting AppleCare or not, since Apple doesn't cover accidental damages. Here is the link.

http://www.flickr.com/photos/42484928@N08/4784644085/in/photostream/