Traded in Forza 4(which I only paid $30 for) and got $30 toward this. Then got a friend of mine at Harvey Norman to tell JB HiFi they had it for $40(they didn't even have it in stock, but hey) and they price matched it. So I only had to shell out $10!
Played the first two years ago but have never played Peace Walker. Should be good fun going down memory lane