The very first news item at the very top of the page, takes you to an article that only mentions the early bird prices. If you click on the link where it says "CLICK HERE to commit to 2019 and purchase your season tickets now!", it takes you to another page where it again only lists the early bird prices, and has a button that says "Purchase your season ticket now", which if you click on it, takes you to a "Sorry... the page could not be found" page.
That's following the link right at the top of the page, which is where most people will go if that's what they've gone to the site to find.
If you follow the one lower down, or the one from your first link (your second one doesn't work by the way), then it takes you to a page saying "2019 Season Tickets (NOW HIDDEN FROM PUBLIC)" which is incredibly confusing, and lists the ticket price as "Ticket Price: £99.00 - £599.00*". So doesn't give you any real information. It also doesn't let you purchase online like the links suggest you can, it just says "Contact venue".
I actually wasn't criticising, I was just after the prices for my friend. I was pointing out that the club might be losing out on sales by having links that don't work. I'd think it's worth their while fixing that.
At least now I do have the prices though, thank you for that, I'll let him know when I see him tomorrow. It's a shame they're in a week old news article rather than in the massive "Buy season tickets here" link, but at least it's there somewhere.