After hearing all about Guild Wars 2 recently I'm now in a state where I'm probably going to purchase it on the day of its release, however after looking around some online shops I appear to have missed out on the pre-purchase.
There are some people selling just the 3-day headstart pre release keys on a certain auctioning website, my question is, if I were to buy one of those would I be able to activate it to participate in the 3-day headstart and then go and purchase a standard edition on the day of release and input that code to activate a full account?