Well, the main sections are the majority of the stadium - I think these are overpriced, you don't then? You had better hope there are a lot of Amex patriots like you around because I know few rugby fans who think £60, £45 and £35 are fair prices to watch teams like Samoa and USA. No slight on...
Just taken a look - surely it's ludicrously overpriced? Those prices are fine between the top 8 teams and beyond pool stages, plenty of demand for that.
But rugby is not like football, generally teams outside the top 8 don't have any chance of beating the big teams, you'll get a lot of mismatch...