A friend of mine was a barber in Kearny , NJ. He collected straight razors and other barber stuff. Some guys doing a renovation on a house in town found a 7 day set of Joseph Rodgers NOS in the box. It was stuck in between some rafters in the attic. They brought it over to the shop and gave it to my barber friend. People gave him stuff like that not infrequently.

For NOS razors currently, try the Revisor website. Thomas has a stash of vintage NOS that seems to be ongoing last time I looked.