ThanksMore or less yes, you need to be an official member to get a ticket. The tickets go on sale in stages - 1st priority for members with 15 credits, then the next day for any official member at which point they usually sell out in 5 minutes. In theory, they should go on general sale after this but they never do because they are already sold out. A few days later, tickets to be resold by season ticket holders become available but only to official members.
I don't think you need to find the resale page - if you are an official member, relisted tickets are automatically shown when you click 'buy tickets' for the game you want to buy for. You may need to keep checking constantly as tickets get snapped up quickly as soon as they are relisted.
I found it eventually ! A few tkts in main stand available at the mo