You misunderstand, when I say expensive I don't mean full price, i mean full blown ripoff.
$109 AUD - which if i did the math right would be $119.50 USD given the current converstion rates. Does that sound fair to you?
and there were things in the trailers that were obviously cut from Portal 2. And the fact that this stuff is ready so soon tells me it probably IS the cut content from the game repackaged as DLC.
For me there's definitely value in replayablility but as someone else said - replaying Portal games is like trying to do a crossword you've already solved.
I loved playing P2 but it was just too short - especially when there were so many new things to play with.
Gamestop -
http://www.gamestop.com/xbox-360/games/portal-2/77277
and EB Games Australia [which is owned by Gamestop] -
http://www.ebgames.com.au/search?title=portal%202&platform=xbox360