So I came across this helpful website that many of you might already know about, but for those that don't:
http://www.nowinstock.net/videogaming/games/destiny/
From this page you can check Destiny's different edition's availability from all the major retailers selling them.
If you haven't yet snagged the edition you want, I hope this page helps.
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*After watching this site occasionally for the past few days I've actually noticed that these retailers replenish their stocks of all versions in seemingly very small quantities, ostensibly, because they flash back to 'out of stock' very quickly,