Great deal especially if you pick up a PS Plus subscription as well so you can download Uncharted Golden Abyss, Gravity Rush and Wipeout 2048, three of the best games for the system, basically for free.
This dropped to $40 like 2 weeks ago and I missed it before it shot back up to $80. Thanks for the heads up though OP, maybe it'll drop a few bucks again.
If you think this game is bad then you obviously haven't played enough games to know what a bad game is. Sure it's not as good as some of the older ones but with a friend it's a lot of fun.
I really wanted to like XIII but I got to the final area and just couldn't finish it. However, XIII-2 was a completely different story. I enjoyed it a lot and feel it's definitely worth the $10 even if you didn't like XIII or are on the fence about buying it.