Have you checked out HomeschoolBuy.com yet?  No?  You should take a look, I think you'll be pleasantly surprised at what you find. 

Homeschool Buy is family friendly, easy to use, and best of all you can sell your Teacher's Editions, as Teacher's Editions!  No pretending it's not a part of the package, no need to give it a name like Parent Guide in order to slip it under the webmaster's nose.  Homeschool Buy has the homeschool parent's best interest in mind. 

Homeschool Buy is where the auction is!