From the description of an eBay auction currently in progress:
You are about to bid on a rare copy of the famous book, SEX by MADONNA! This was a limited release in 1992 and never reprinted. This is copy number 0209633 (as shown on back cover) of only 1,000,000 published.
“Rare copy” — yup, there are only 120 copies currently on sale at ABE.
And it's ‘limited’ to a mere million copies...
Still, the seller at least had the decency to start the auction at $25, while the copies offered on ABE all seem to cost $100 or more.