Mandrake are a second-hand store. A lot of their stock in in unopened condition, otherwise MIB. I've bought from them many times with no problems. Once you place an order they send you the postage cost and whether you want to go with SAL or EMS. If you don't like the shipping charge you can cancel.
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I'm a big fan of anime-export.com and 1999.co.jp/eng/ (Hobbysearch). Their pre-order prices can sometimes be better than amiami.com (whose English storefront is amiami.com, as opposed to their Japanese storefront amiami.jp )