I’m sorry to say that the sales site is not available at the moment. We’ve been having some problems that centre around PayPal purchases. Investigation showed that the problem purchases were those made with mobile phones and tablets. It appears that PayPal uses a different checkout system for phones and tablets than it does for computers, and that system does not interface properly with my website or, indeed, a great many others.
PayPal, it must be said, has responded extremely well to the reporting of these failures and is actively pursuing a solution. From what I’ve seen so far I think the problem will be solved quickly. I’m not sure if the coding gurus work the weekend so that may delay things a little but I am hopeful that I can make the site available again very soon. Please accept my apologies for the inconvenience.