The only problem with that is that you need to email them your order and if you're trying for something rare, it'll probably sell out before they get back with you. Last time I ordered like that with puresound, it took them about 2 days to email me back about my order and I missed out on everything.
What you CAN do though, is create an account on tenso.com. They give you your own address in Japan to ship things to, which allows you to register for a puresound account. That way, you can just add things to the cart and snipe the hell out of them. They let you pay with credit cards, so it works out pretty well. Tenso also has super low fees and shipping(puresound offers free shipping as well). Last time I ordered 2 DVDs from puresound via Tenso, it cost me a whopping 750 to get the items to me(650 yen shipping + 100 yen in fees for Tenso). This way also lets you get points for discounts and take advantage of puresound's sales, which they ONLY offer if you have an account(I've tried asking before when ordering via email and they told me I couldn't get the sale price).