The art collection of eccentric tech mogul Halsley Minor will be auctioned off at Phillips de Pury tomorrow to pay off some of his huge debts. The collection — 96 works by such artists as Jeff Koons, Andy Warhol, Ed Ruscha and three pieces by Richard Prince including “Nurse in Hollywood #4” — is expected to fetch about $25 million, enough to cover the $22 million loan from ML (Merrill Lynch) Private Finance that Minor defaulted on. The art was put up as collateral. Minor, known as “the bad boy of Silicon Valley,” made $100 million in 2000 when he sold CNET. But he spent it all, and then some. The Virginia native bought a $20 million house in Bel Air, a $15 million mansion in San Francisco, and a $15 million plantation on 400 acres in Charlottesville, Va., where he also started building a hotel that’s now abandoned. Among his debts, Minor owes $13 million in taxes in California.