looking to purchase from publisher only a new (that is, not used)
collected works of virginia woolf on acid-free paper and hardbound,
including the collected essays in 6 vols. (not the 4 vol. version
edited by Leonard Woolf), the letters, the diaries,  all novels, all
the nonfiction; everything published to 2003 not just during her
lifetime: where to buy and how much?

Not surprisingly, the complete works of Virginia Woolf have been
published by various publishers, and possibly not all the volumes are
currently in print (though they may be, as Woolf is an incredibly
popular writer). Moreover, publishers would not usually sell single
(or a few) copies of their books direct to the public. But if you
click on http://www.booksfactory.com/writers/woolf.htm you will find a
complete list of Woolf's writings, with links to the books sellers,
Barnes & Noble, so you can order online.