Oct 4th, 2013
I called Fantagrphics books today and they told me they expect this boxed set back in print in March of 2014. They are taking pre orders over the phone. If you like, you can purchase the books separately from them now and they will ship the boxes when they arrive. Their price is just over 51 dollars. More than amazon, but still half of what third party sellers are selling them for. (Ask about any shipping discounts or promotions they may have.)
If the boxed set isn't important to you, Amazon should have both individual volumes for sale here now.
Newest Update: (August 16, 2013)
Well, you've probably noticed the boxed set for volumes 5 and 6 has not appeared as they should have. I was surprised after meeting them at the San Diego Comic convention and their assurances - so I gave them yet another call.
The pleasant lady at Fantagraphic informed me that there was a mix up at their printing company and the slipcases were never ordered.
The individual volumes are now available both on Amazon and through their company as separate books. But they couldn't give me any clear answers as to when the slipcase for this set might get made. ('Maybe a couple of months' was the best she would say.) She did tell me that all this happened because the owner passed away and the order was assumed to have been placed and never was.
She also said that if the slip case is important to you and you order the two volumes directly from them, they'll send the case whenever they get it printed. Call them directly for details.
After a year of calling and printing updates here they seem no clearer today when this complete box set will be available than they were in September of 2012.
Fortunately Amazon has the individual volumes here at a good price. Considering how long this has been going on, you might want to consider how much a cardboard box is worth to you.
It is certainly not worth what third parties are asking for it.
And if you read this, please rate this review as helpful so it moves up in the list so every can see it. Thank you.
I've truly enjoyed these Peanuts volumes. They're handsomely produced and a joy to read. No comic today comes close to the simple charm of these classics. The volumes themselves are well bound and a little bit on the small size in compared to the larger reprints of other comics done by IDW and other companies. But I think the slightly smaller size only adds to their charm and makes them easier to read/store.
Unfortunately I've had to stop buying them with the early 1960's volumes because those boxed sets are out of print and impossibly high priced from 3rd party sellers. Fortunately, I've contacted fantagraphic books directly and they told me that the boxed sets of volumes 5 & 6 (1959 thru 1962) will be reprinted in August of 2013. (see above)