A few of us understood what you were asking.
There is a bit of ambiguity introduced by using the term “legit seller,”as this particular business does not appear to comply with domestic norms, and perhaps laws, relating to the use of others’ designs and/or intellectual property.
You were focused on whether it was just some BS website or if they actually make and ship product. Others were focused on the other part.
This issue has come up with some regularity in this community, dating back at least to the Chris Moneymaker era, as people often want to design customs that “look just like” some other chips they previously saw.