I phoned up to buy my Northampton tickets this morning. Sounds as if the initial allocation is now almost sold out. (They mentioned a possible further allocation of 500 tickets, but can't be sure about that.)
I'm sure the initial allocation is for behind the goal. They've been known to open about half the side stand on the right before as like an "overflow". They'd be silly not to give us more if the demand is there. I can't see there being a home sell out based on their current state of affairs.