I may be wrong, but the only Box Set of the 2006 Special Editions (including the bad transfer the OOT) was sold in a collectors tin by Best Buy for a very limited time. It is pretty hard to find now, even used. Is is referenced in this thread:
http://originaltrilogy.com/forum/messageview.cfm?catid=2&threadid=7157

But as many devoted Star Wars fans will tell you, just wait a few months for Lucas' Star Wars 2007 Super Duper Special Double Dipped Atomic Powered Edition which will have the completely remastered Original Trilogy on the Bonus Disc. But I would wait for the 2013 Star Wars Super Duper Special Double Dipped Atomic Powered Edition which will have the completely remastered Original Trilogy on the Bonus Disc presented for the first and last time* in Blu-Ray format for High Definition viewing.

(*Last Time as it is used in this paragraph will mean until the next time.)