Hey,
maybe you know the pet White Kitten which is only sold by Little Timmy in Stormwind.
Well as far as i know nobody has seen him or the Kitten in the Cata beta.
So it seems we have another high value Pet.
I'm not 100% sure about that, maybe just nobody found the new way to get it yet or Blizzard will put him back in as soon as they hear that he is missing but better gather some to be on the safe side.
If you sure i'm totaly wrong, and you can proof it, post it.
Edit: For some help buying the kitten: Lil Timmy spawns every 3 hours at the entrence of the harbor.