The collector’s edition of Guild Wars 2 costs 150 dollars. It’s a limited time offer, and they intend to only produce a certain number. So get them while they’re still around if collector’s edition items and advantages are important to you. [Guild Wars 2 main page]
10-inch Figurine of Rytlock
112-page Making of Guild Wars 2 book
Best of Guild Wars 2 Soundtrack CD
Art Portfolio and Five Art Prints
Custom Art Frame
Summon Mistfire Wolf Elite Skill
Chalice of Glory
Tome of Influence
The most interesting items from this seem to be the summon Mistfire Wolf Elite Skill, as well as everything else. The physical items will become valuable eventually, so they may actually serve as a good investment, or just the ultimate collection for a true die-hard Guild Wars 2 fan.
And check out the "suggested by the author" links below for more!