I buy groups of 10 ISBNs and then sell them each at exactly the cost. The minimum # to buy for me is 10 for $245 U.S. 
 
 

So I sell you one for $24.50. The ISBNs are registered to unaink which is just a ghost, registered in the Caymans.
 
 

I do ask that you voluntarily donate to the Spalding Gray Memorial Fund – see www.spaldinggray.com for details. This is because of my obsession with Spalding as well as the fact that it is a very admirable project. Just email and mention ISBN in subject so it doesn’t get beheaded by the spam guillotine. Thank you. John