Avoid this scam company
That link is from 2010. I recently purchased one with £2.50 p+p, which you can pay online upon receipt. I also emailed to confirm that I would not be purchasing anymore. I received a reply acknowledging this and a receipt by text. A few weeks later I received a follow up telephone call, but merely said I was happy with the coin and would not be purchasing anything else. No issues whatsoever.
This company are a joke. The coin is just a cheap struck medal. Read this: https://forums.moneysavingexpert.com/showthread.php?t=2018327
£2.50 Postage (annoyed)