The Japanese "Some Might Say" comes in a standard jewel box (with the UK insert photo squooshed in order to fit ... it looks a bit strange

), and includes two additional tracks ~ a cover of The Beatles' "You've Got To Hide Your Love Away" (virtually a Noel solo recording), and Noel's original demo for "Some Might Say" which is a little slower and heavier than the hit version (and of course has Noel on vocals rather than Liam):
This is still in print in Japan so you can get a new copy, but Amazon's third party dealers have it for about half the price:
http://www.amazon.com/dp/B00001NFHO?tag ... R9SBXKNZQ&
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The Japanese "Who Feels Love" (again in a standard jewel) includes a Noel-sung demo of "Gas Panic":
(Can't find an available copy of this ~ you might need to eBay this one.)
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The UK CD/DVD set of "Hindu Times" includes a Noel-sung demo of the title track with very different lyrics that change the whole tone of the song:
http://www.amazon.com/dp/B000063T2M?tag ... YPQG9REWR&
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The UK CD/DVD set for "Stop Crying Your Heart Out" includes a demo version of the title track:
http://www.amazon.com/dp/B000068PP2?tag ... X0P21VBDZ&
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The Japanese edition of the
Don't Believe The Truth album includes one track that hasn't been released anywhere else, called "Can Y'See It Now? (I Can See It Now)":
http://www.amazon.com/dp/B00092QTL8?tag ... SHGB6YPFT&
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The UK soundtrack album for the movie
Goal! includes three Oasis tracks ~ one is an excellent, otherwise-unavailable song called "Who Put The Weight Of The World On My Shoulders", the other two are weird remixes of "Cast No Shadow" (remixed by Unkle) and "Morning Glory" (mixed by Dave Sardy).
http://www.amazon.com/dp/B000BH78P2?tag ... ACR0MQS4S&