Could be a sleeper agent, or it could be someone who is just getting out of dodge. Very strange based on your past observations about the shop.
This is the same smoke shop that I reported to authorities back in early October and never heard any more about.
I went in there one day and there were stacks and stacks of unmarked carboard boxes, approximately 3ft x 3ft, stacked one atop the other, stretching all the way from the front to the back of the store. I did not mention them to the owner but he made a point of coming out from behind the counter and telling me that his warehouse was full and he had no where to store these boxes and that they contained those cigarette rolling machines and papers. yeah right.
Strange happenings and stranger comings and goings in this store.