We use Coinpayments for processing purchases.
Some of their fees can be quite frightening, so if you have and account at Coinbase you can send payment using Coinbase.
In order to do this, please place the order via the Store and start the Coinpayments process. When you are shown Payment Options (e.g. Bitcoin. Litecoin, Dogecoin) click on the CANCEL button. This will stop the process at Coinpayments but still leave your request in the site Ledger as Unprocessed.
Contact Admin and ask for the Coinbase payment details and then send your payment using the Coinbase Email system. This will incur very low fees (if any).
As soon as Coinbase advises Admin that the payment has been made (usually Instantly) your Order in the Ledger will be released and you account will be credited with your purchase.