I left your post there for two reasons, one you raised the question of the series being put up for adoption. I would think that would be an ideal solution to retain this series which I have always praised and described as excellent.
The second, is that you gave a brilliant defence of my £3 p&p charge on eBay. However, nobody needs to buy the coins on eBay, I have always offered them on this web site for £12. What you didn’t mention was the 10% eBay selling charge, the listing charge and PayPal’s cut as well, when you get paid. The total is about £2 per coin, which is the extra I charge on eBay. Not that I ever had any intention of selling them there, but I was surprised at how much geocaching stuff is available on eBay, often at much lower charges than in the on-line shops.