My last post, but yes they have on their website (I didn't just pluck my quoted figures out of thin air)
https://www.southamptonfc.com/en/news/article/latest-news-on-saints-season-tickets-for-2023-24
FAQs: *What are the prices and when can I buy? *Depending on where you sit in the stadium, Season Ticket savings will vary anywhere from 6% up to 30%, with 10% on average.