Hmmm... That's curious.
My first thought was: Maybe they don't want to get into trouble for selling teacher's books with answer keys to school students. But, if they're pulling the homeschool books, too... well, I hope they just made a mistake. Otherwise, they're going to lose some business. There are a lot of homeschoolers who buy books on Ebay.
That's strange because I JUST purchased a Saxon Math Teacher's Edition on Ebay.