I agree that selling teacher's editions of regular textbooks used in public schools is probably a bad idea, since the only ones buying them at auction would most likely be students wanting to cheat, but for textbooks that are designed for homeschooling, it's rediculous. The only people that would be buying those books would be parents teaching their kids. It's not like they couldn't put those books in a separate catagory or something to allow homeschoolers to continue to utilize their services.
I don't think I'm going to boycot e-bay over it because there are so many other things you can still get there for your homeschooling needs and wants, but it still sucks!