Check Baen too. They have it. They also have The Wizardry Compiled for $5.00. And Wiz Biz II: Cursed and Consulted for $4.00. This one contains The Wizardry Cursed and The Wizardry Consulted together in one volume.
http://www.baenebooks.com/s-23-rick-cook.aspx
I will be getting these too. I read them in pb years ago and want them in ebooks.
Apache