I have some grandcentral invites. These are very hard to get. I will sell them for 99 cents which is 1 dollar off or 1000 points. Note According to marketplace rules If i SOLD you an invite you may not resell untill I have run out. I currently have 34 invites but I have only 6 links.. After I sell 5 I will make one account to give out free invites. Grandcentral.com It's a free voicemailbox by google with many features. Youtube grandcentral it would show you what's it's use.