What Site is good and can be trusted when it comes to buying english Manga?

-Hello, I totally love Manga, and finally wanted to get around to buy the Manga of my favourite Anime, Mahoromatic.

I usually buy my Manga at Amazon.com, but I want the Volumes in new, or good Condition, but they don't have all of them, and buying the used ones, makes me wonder, how they will look when they arrive.

By searching through google, I found animewild.com, and it has all the Volumes, but when I click on register, firefox says that the site cannot be trusted and such stuff, so I got an kinda insecure feeling about that site.

Can anyone recommend me a good site?

I really want to buy them, so no Download links/Sites, please :)