How do you know if tickets have sold out on ticket master?

how do you know if tickets have sold out for an event on ticket master? When i try to purchase a ticket for a specific concert it says that they currently have no tickets on sale for the event, and over the phone it says something about ticket sales being exhausted. However, people over message boards are saying that it works on their computers and they can successfully buy tickets.

Ticketmaster are in the business of selling tickets - if they have some for available for sale they will want to sell them to you.

Maybe they have you marked as a major ticket scalper? - try from a different computer - if its still the same then the event is sold out.

Maybe the people on the message boards are in a different country or state?

If you want to go you will need to purchase tickets in the secondary market - have a look at tickex.com for that.