It is well-known that Newton's Principia was published by Halley at his own expense, and the story of writing, editing, printing, correction and proofreading is well described in Newton's biographies. However I cannot find some important details:
How many copies of the first edition were printed?
For what price they were sold?
Did Halley get the proceeds from the sales? If not, who did? Newton? Royal Society?
Can anyone help me to find this information?
EDIT. Since I asked this question, I found some relevant information in the article of B. Cohen, supplementing my own copy of Principia (1999 English translation:-)
A. N. Munby estimated the size of the first edition at some 300 or 400 copies, but the number has recently been increased to perhaps 500. Whiteside recons that granting this larger size of the edition, Halley would not have suffered financially by paying the printing costs and would even have made not less than 10 pounds in pocket for all his time and trouble.
D. T. Whiteside, The prehistory of Principia from 1664 to 1786, Notes and records of the Royal Society, 45 (1991) 11-61.