You can pay on the day with no price increase, according to our box office. Went down to get mine today. They also tweeted that we'd only sold around 300. Embarrassingly low, but I can fully understand why people are staying away at the moment.
I wouldn't read too much into ticket sales. Alot of folks won't make a specific effort to get a ticket sorted in advance when the game isn't going to sell out and there is no price increase on the night. Easier just to turn up and pay.