I went one step further, thinking maybe the person just doesn't know any better. I sent them this email:
You may be new at this, so I wanted to let you know that it is against Ebay regulations to sell living animals on Ebay.
It sounds like you are in an unexpected bind with your tortishell kitten, and I am very sorry to hear that. I am a moderator on a cat welfare board, and invite you to come there for suggestions of ways to find a loving forever home for this precious creature. The address is www.thecatsite.com/forums
and you will find a great support network and people from across the country who will help in any way we can.
If you would like to respond to me, please email me at heidi@thexxxx The default email address you will see is actually my husband's home email account.
Thank you, and I hope we can help you with this kitten.