You cannot enter the Buy button just a red blank button in its place, so maybe down or sold out.
Although Man Utd tickets show the same and I do not think they have sold out yet.
No if you are not on any club coaches you are held afterwards for about 30 minutes and then escoreted to Norwood Junction by police, if you want to go there or not. Then you are normmaly put on a train that stops at East Croydon, Haywards Heath and Brighton.
So when are the details released then it now less than 24 hours before they are on sale at 9AM tommorow. According to the clubs own ticket sales dates.