Thanks to Erin Wolkenbach for letting us know that Hasbro Pulse has set up their online store where they will sell Jabba's Sail Barge to International customers.
UPDATE: German orders can be placed here! (EUR 441,45 + EUR 358,77 shipping + customs fees!)
The description for their online store reads as follows:
Hasbro Pulse brings you product offerings from the brands you love. Star Wars The Vintage Collection Jabba's Sail Barge (The Khetanna): Measuring approximately 4ft long, this vast vehicle is a dream item for any Star Wars collection. Designed to captivate and inspire, The Vintage Collection Jabba's Sail Barge (The Khetanna) features exquisitely detailed, fan accessible decks that complement 3.75-inch figures (not included) allowing fans and collectors to recreate intense battles in the Star Wars saga. Complete with premium deco, vintage packaging, and soft cloth sails, this dream product offers Star Wars devotees the quality and realism they know and love. Included with the vehicle is Jabba the Hutt and Yak Face (3.75-inch scale figure).