Most can be cleared solo at higher levels, netting 500–1500 gold per run, plus the chance at WoW Classic 20th Anniversary Gold rare mounts like Invincible or Ashes of Al'ar. Farm Rare Materials and Items Some items stay in demand no matter how old the expansion is. Collecting these can provide a steady niche income. Examples: Ghost Iron Ore (Mists of Pandaria). Embersilk Cloth...