I don't know what the season 3 vendors are like now... but earlier they were pretty crazy. Here are some new locations:

For your Season 3 buying pleasure, vendors will be made available in some additional locations. If you want to avoid the crowds in Area 52 there will be vendors selling the same items outside of the NagrandBlade's Edge arenas, as well as in the town of Gadgetzan.

We recommend visiting these alternate locations to ensure you're able to view and purchase the items with the least amount of interference, both from visual lag, and trigger happy players.