I actually purchased a White Refurbished Wii from them about a month ago. Everything came in the cling-plastic and foam wrappers. Had I not known it was refurbished when I purchased it, I definitely would not have been able to tell from the physical appearance of the package and its contents.
I haven't had any issues with the system, so I thought it was worthy to share when I saw this deal on the black model. Obviously that's just one experience, but maybe that helps.
I believe they sell on their own site, through eBay, and through an Amazon storefront.