I recommend you check out Authentic Genetics Seed Company. It has collections from guys who connected with the oldtimers and are the real deal. One of their missions is preservation of landrace genetics. Mel Frank (one of the authors of the seminal growers guide) has teamed up with Bill Drake, (genetics/breeding guru) and Todd McCormack to form AG. I was lucky enough to meet Mel around 1980 and was gifted a pack of Afghani, and it was the real thing. Recently I connected with Mel and Todd through AG Seed Co. and purchased a few packs, delivery was fast and everything had 100% germination. No question in my mind they are top-shelf genetics. You could argue all day about what is "authentic"... and the twists and turns taken by a strain before making to today's market. What really matters is "what is the end result this season?" I say you can't go wrong with the AG offering because the results speak for themselves.