You've got this buying stuff sussed! I'm doing it all wrong lol.
Very good deal you got for the OST. I also got an amazing deal for the Limited Edition FFXIII OST, it was listed on Amazon for £19.99 and was listed everywhere else for 3 times that price and in the US it was $119.99 so of course I instantly bought it.
I love the soundtrack too, trying to get used to FFXIII-2's OST - it's not as good but I'm growing to like it more.