Pre-purchase for GW2 Heart of Thorns is available now and will guarantee early access to beta weekends.
Standard edition will cost $49.99, Deluxe $74.99 and Ultimate Edition $99.99. The cost according to Arenanet is for the expansion only with the core game included for free.
To clarify: $50 is the price of the expansion. We included the core game as a free bonus to make it easier for new players to get into it. – Source
Pre-Purchase here: http://buy.guildwars2.com/store/gw2/en_US/html/pbPage.heartofthorns
Mini Revenant Rytlock
Glider Skin & Decoration