Idolm@ster DLC sale?

(tags game, Xbox 360, cosplay, bishoujo, purchase, Idolm@ster)

Announced in last week's Famitsu in the Idolm@ster "sequel" article was the "Platinum Collection Celebration Part 1" item sale (「アイドルマスター」のプラチナコレクション発売記念第１弾！！). There are 22 items discounted at 33% or more, and the sale lasts for about a month (until 11/26). I wonder if there's going to be another sale, since it says its the first one.

So I collected the pricing info on all of the DownLoadable Content (DLC). I have a whole Google Spreadsheet with all the items, but the long and short of it is, you could be buying a PS3 with the money:

First off, I totalled the Microsoft points. That's the first column. The remaining columns are various ways to get points, such as a credit card, or a prepaid card from a retailer like Sofmap or Sega Direct. The first row is "Purchase all items". It's 43,050 points or a flabergasting 6_4575 yen. Buying points by credit card gives you the least amount of bang for your ... yen, so let's try retailers. I already bought a card from Sofmap, so I had to include them there. If you keep buying from them, then you save 3000 yen. Big woop. The surprise was Sega Direct's pricing, which helps you save up to 6000 yen. Unfortunately Sega Direct is all out of cards.

There might be additional sales later on, so let's just consider the current sale items. That's the last line row there, and the price is 5000 yen, give or take. Terrific. If you truly can't wait for any additional sales, you can get the whole thing for 59100 yen, starting in 2 days.

Are these items unlockable in the game or no? They must be additional items. Probably some of them are rare items. In any case, it is imperative to play the game before reaching for the points.