I know it can be hit or miss but do not forget craig's list for growing equipment.
There are some great deal from folks that are upgrading or dismantling their grow rooms.

Picked up a 600w HPS still in the case with an air cooled hood for $250. Other than that I use HTG or The Big Tomato locally. I find off hours, like first thing on a Sunday morning or when they first open in the AM is the least crowded.