Hi JB,
Sometimes it takes a few hours before items listed on ebay appear when you search for them, I've had this happen on a few occasions!
I've just searched under carpet cleaning and you're right it doesn't appear yet. Give it time and it will. Your description is about right as well, I put carpet cleaning / cleaner / machine in the title of machines I've sold on there and had a great response (and good prices paid)!!
Sold an older yellow ninja with just hoses, wand and handtool a year ago and it fetched nearly a grand, good luck!!
Kind regards,
Jason.