I'd like to know how many different national best sellers lists there
are for books (New York Times, USA Today, Publishers Weekly,
Booksense, Christian Booksellers Association, ECPA, etc.  Frequncy of
publication isn't needed.  I say national to limit the scope.  A list
of the names of them would be good.  Links to them are not necessary.

Dear Human, 

Your question is about to expire without having been answered, and you
might be disappointed.

One of the possible reasons for that might be that you have asked for
a definite number. However, it is probably impossible for a researcher
to know whether he or she had found all lists, or that some
small-scale organisation (say, "National Organisation of Welders") has
a bestseller list ("Best selling Welding books of this month").

In addition, the pricing might be a bit low for the type of research
requested. Here is a link to guidelines about pricing your question, in the
pricing guide: https://answers.google.com/answers/pricing.html - I
hope this would help you price your next questions on Google Answers.