Never really had farmed for anything before but liked when battle pets came on scene and decided to farm for I think Sprite Darter Hatchling. Ended up looting a Emerald Whelping instead and was shocked it was selling for 14K (was a big chunk of change then). So I put it up for 13K and to my surprise sold 1st listing. I saw gold was to be made in the pet market I just bought low and sold at normal price. Not only did I start making gold but started slowly adding hard to get pets to my collection by way of AH.
I think WOTLK was bizzards best expansion but for me if battle pets had not been introduced my wow days would have been over long ago.
Wish to thank wow-petguide for a battle pet site that I have long been searching for, only to find out their vision expanded way beyond mine in what a battle pet site should be.