As far as I know, the set was not pulled from the shelves, but it was produced in such small quantities that the Christmas rush took them all away... Which, I concede, it's pretty weird, for the set has got no bonuses of remarkable interest.
It's almost impossible to find, both online and at brick & mortar stores, and those who still have it are overcharging for it.
Since I LOOOOVE the first film but found the Greengrass installments only so-so, I had refrained from buying them as they were released, but I found a copy of the collection at a local Best Buy for $40 (although their website did not even listed it anymore) and, since it was cheap and already something of a collectors' item that I could eventually end up searching and paying quite higher for, I gave up to temptation.