Vanity pet, or companions as they are now called, sellers should start to see a spike in sales with the new achievements for companion collectors. Coming in Patch 4.1 are 2 new achievements. These achievements will be awarded for collecting 100 pets and 125 There are also 5 new Vanity Pets coming soon.
Companion Pets Sales Spike
If you aren't in the vanity pet market, then now may be a great time to enter and start dabbling in this market. This has long been a very lucrative market on my server, especially if using the neutral auction house to trade cross-faction. Players just love collecting things likes mounts and vanity pets. There is ALWAYS a spike in sales of companion pets when new acheivements are introduced into World of Warcraft. These achievements will spark an increase in sales of these companion pets as early as...already. Players that are already aware of the incoming achievements have begun to start pushing for those new achievement quantity requirements. Hopefully these will award new vanity pets for completion.
The other time that vanity pets see a noticable sales spike is during In-Game Holidays. Check out my Guide To Vanity Pet Sales to get you starting profiting on the auction house within the companion pet market.