you might want to post this in the authenticate this thread -- usually I say avoid places like this, but I looked at the site and the MJ bags offered -- I can't say those are ones that are commonly faked (for ex: I don't think I've ever seen Washed Rose faked, BUT I could be wrong) -- it almost looks like a consignment shop, but according to their description, it's not.
I would try communicating with them -- see if they can send addtl pics, etc to verify authenticity -- it's possible it could be legit, but I can't say for sure either way.