Here's a 10 minute piece where I discuss my experience farming the Whelps in the Badlands from levels 40-45. This gold farming spot is considered one of the most lucrative locations in Classic WoW for a few different reasons.
The Whelps drop 2 gray vendor pieces -
Ripped Wing Webbing
2 White Items -
Small Flame Sac
Heavy & Thick Leather
Companion <0.1% -
Small Flame Sacs are used for Fire Protection Potions and Wicked Claws are used for Lionheart Helm which is BIS for Warriors and Wolfshead Helm which can be considered BIS for Druids. These reagents are going to be your main source of income and hopefully you'll be lucky enough to find a Dark Whelpling companion which can sell for +100g on the Auction House.