At the time I signed up it would expire 30 days exactly from the date I signed up. At some point if you do not get the welcome back items they will be lost to you, however if you signed up next week...
Well first of all you need to think of the prices of 1 gogo, then times it by 150+. now you have a base to show how you have spent on them. Now all you have to do is decide on a price around that....