I believe they'll be on sale until April. I forgot which day, but they won't be out of print until April. So I suggest buying them before them. CDJapan has a page of the avex reissues, so you might want to check out that page to see what the actual date is.
Also I believe the tracklists are all the same, I don't know if those extras were already in the DVD before the reissue came along.
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