Tickets Center is a scam, and I suspect what they do is to offer tickets until someone purchases them from Tickets Center at an inflated price that Tickets Center lists, then once you make the purchase with Tickets Center, Tickets Center goes off and buys the tickets for a fraction of what you paid them and they provide them to you a few days later.

This is what happened to me: I purchased tickets for an event that they somehow did not know what time it would be on that day, and then a few days later they said my tickets were available, and they provided me with tickets they charged $210 for that I could have purchased for $30. Tickets Center has an absolute no refund policy, which is another indication they are a scam.