The games I bought from him several years back were NOS. The selection has thinned out considerably since the time I was buying, most of those titles are no longer sold. I don't think "the Chinese" are manufacturing an endless supply of fakes for this guy to sell on ebay.
He was a good seller from what I recall. Some games arrived nearly perfect, others had obviously been stocked at some point and exhibited minor shelf wear (or department store stickers). There are sellers who disclose every imperfection, but generally they are much more expensive.