Making money in the age of Northrend
The Mote extractor remains the Engineer’s unique resource extraction tool, and so remains a source of revenue for the engineer in the Wrath of the Lich King expansion. End-game level guns also remain a source of wealth.
Surprisingly, pets make a come-back as a source of income due to the pet collection achievements. While there was an early market for the motorcycle mounts (among the most wealthy on each server), this market dries up quickly. The remaining people seeking them will generally have a guild member who can craft it for them (given sufficient resources) by the time they can afford it. On the other hand, with level progression available to 80, fewer engineers are gaining the Consortium reputation required for Elemental Seaforium Charges, expanding the market for those who have the recipe. Typically, though, this will be a ‘tips’ market, as the engineer seeking parts for her flying machine will be able to provide all the parts for the charges.