If you have some offers, you might want them to post here. So others can see what what those particular pets will sell for.
@celticus mentioned some prices in a post above, but my opinion is that your pets won't bring those prices. The Nightmares especially, because they aren't "nice" PP ones. I have also recently bought several WW's for less than "suggested".
Bottom line, I am interested in the WW's and nightmares, but, if you have offers at/above those numbers, you can probably sell them and be done. My guess, however, is that no one is offering those amounts.
Post the offers and let potential buyers see what we are up against.
Thanks!