-Most of them are level 6: Frankly, any of them level 6 and above are suspect. I unfortunately have bought one at level 6, and one at level 11. They have appeared in trade chat and on the auction house.
-If it's too good to be true...: You know the rest. I have a notification threshold set for 150k. The first one I bought for Quid I paid 200k in gold and trade for a level 1 on Uther. The one I bought myself I paid 220k from the same person. Both were level 1, and both were from a pet seller who has been in the business for a long time. It appears that any below level 6, i.e level 1 thru 5, are legitimate. The price of the real ones are becoming depressed by the fakes. But, as always, buyer beware.
This is reminiscent of the Mount duping that happened in Cataclysm with Crimson Death Chargers, and again in Pandaria with Jeweled Onyx Panthers. In those cases, buyers kept their chargers, but the panthers were removed from people's spellbooks, from what I've heard.
Threads regarding the cub, but the jury is still out on whether or not they are actually being duped:
With that said, Aellin has finished her quest for Shado Pan Assault has come to a successful conclusion! With that, my new set is ready to roll. But that'll have to wait for another day. Have fun out there, peeps! :p