Boy. I have about 40 sets left. I can't guarantee how long they will stay in stock, but they aren't going to "sell out" in the next month. Interest seems to be picking up as people see the positive results on paper and not as a theory. I may have another (smaller) run made if these sell out in a somewhat timely fashion. But to answer your question, I would anticipate them running low by the holidays. Keep in touch with me, and if you are bound and determined to get a set, you could give me a small good faith deposit, and I'd put a set aside for you. Thanks for your interest, Mark