Where can I post listings for my pets?

My dog had babies, and i have already found realatives and friends to take some but now I have two pure bred male German sheppard pups to sell; how would I be able to put a free listing out? Craigslist doesn't let you, and I really want to find these babies a good home before they get bigger (even though they're only ten weeks right now). I heard about a website that let's you put out posts for pets for sale but I do not know the name. Anyone have ideas?