It's still 59 bucks on the main GameStop site, probably just a temporary sale or something.
I've played through the whole thing, Haze is actually entertaining. I liked the campy atmosphere and characters that Free Radical was going for. The game definitely has its moments. I loved the last few missions and the way it ended especially, although the last boss fight wasn't challenging and long enough. I don't understand why it would be deserving a 5/10. Some missions, like the one where you pursue the rebel leader in an old abandoned factory, when you try to escape through an empty hotel, and the one where you must save the bombarbed village, are truly great. It deserves a good 7.5/10 or even 8. It's definitely a lot more entertaining than Blacksite or Turok. There's nothing broken about it, there's not a single bad level either. It's exciting from beginning to end, even if it only lasts for 7 hours or so. Why did people make a big deal about having to push switches or repetitive one-liners from NPCs?
Yes in the end it's very linear, standard shooting, and it takes too much inspiration from Halo, and the low-rez shit sucks, but it's definitely a decent offering.