Ero posted this link on his blog:
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It seems "manually" requires a PayPal account, this is from a comment from DeviantArt:
So, for us at least, the credit card option still wasn't working. We got some advice from Rende', but it ain't instant gratification. Still, we're trying it -- despite the fact that it will slop over into Christmas, and probably be delayed because of that. Here's what they told us...
You can use the manual payment option.
If you would like to pay for an order via PayPal but it is not presented as an option during checkout please go ahead and complete your order and choose "Manual Payment" as the payment type. Then remit the amount owing in USD currency to
cgbi.payments@gmail.com via the Paypal.com website.
Be sure to remit in USD currency and only reference the ORDER NUMBER in the comments. If there is any other text other than the order number included in the comment the payment MAY BE REJECTED.
Once we receive payment we'll process your order and you'll receive the download links for your purchases.
So... We shall see! :-/
I don't have a PayPal account so I can't try it, hope this helps.