A simple gold tip for anyone with a rapid transport toon (engineers, mages, etc.): head to the Consortium in Stormspire and grab the occasional adamantium frame from the spare parts dealer plus the selection of pets from Dealer Rashaad. These are easy to get, unlimited quantity (for the pets), and sell well on most realm auction houses.
Just be sure to set the floor of your pricing in TSM to the pet value plus the AH fee so you don’t lose money!